Scholars@Duke
Timothy Crawford Sell

Timothy Crawford Sell

Associate Consulting Professor in the Department of Orthopaedic Surgery
Orthopaedic Surgery, Physical Therapy
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Selected Publications

Reliability, discriminant validity and sex comparisons of dynamic postural stability during a landing task designed to challenge transverse plane knee stability.

Journal Article Sports Biomech · June 2021 Internal and external rotational knee stability is essential for sports performance and excessive rotation can lead to injury but is rarely assessed in injury risk analysis. The objectives of this study were to determine the between-session reliability, di ... Full text Link to item Cite

The Relationship Between Hip Strength and Postural Stability in Collegiate Athletes Who Participate in Lower Extremity Dominant Sports.

Conference Int J Sports Phys Ther · February 1, 2021 BACKGROUND: Lower extremity (LE) injuries are common across many sports. Both core strength (including hip strength) deficits and poor postural stability have been linked to lower extremity (LE) injury. The relationship between these two characteristics is ... Full text Link to item Cite

Hop Testing Lacks Strong Association With Key Outcome Variables After Primary Anterior Cruciate Ligament Reconstruction: A Systematic Review.

Journal Article Am J Sports Med · February 2020 BACKGROUND: Single-legged hop tests are commonly used assessments in return to sport (RTS) testing after anterior cruciate ligament reconstruction (ACLR). Although these tests are commonly used, their predictive validity has not yet been established. PURPO ... Full text Link to item Cite

Sex differences in lower extremity musculoskeletal and neuromuscular characteristics in intercollegiate soccer athletes

Journal Article Science and Medicine in Football · January 2, 2020 Purpose: Establishing sex-specific musculoskeletal characteristics promotes specific and effective injury prevention. The purpose was to identify sex differences in musculoskeletal characteristics in soccer athletes.Methods: 80 collegiate male and female s ... Full text Cite

Postural Stability Under Dual-Task Conditions: Development of a Post-Concussion Assessment for Lower-Extremity Injury Risk.

Journal Article J Sport Rehabil · January 1, 2020 CONTEXT: Concussions are consequence of sports participation. Recent reports indicate there is an increased risk of lower-extremity musculoskeletal injury when returning to sport after concussion suggesting that achieving "normal" balance may not fully ind ... Full text Link to item Cite

Examining the link between thoracic rotation and scapular dyskinesis and shoulder pain amongst college swimmers.

Journal Article Phys Ther Sport · November 2019 OBJECTIVES: In National Collegiate Athletic Association Division I swimmers, we examined the differences in thoracic spine rotation in swimmers with and without scapular dyskinesis and the relationship between thoracic spine rotation and shoulder pain/dysf ... Full text Link to item Cite

The Warrior Model for Human Performance Optimization.

Journal Article Sports Med Arthrosc Rev · September 2019 Special Operations Combat Personnel (SOCP) face significant challenges and occupational demands that put them at significant risk for musculoskeletal injury. Musculoskeletal injury leads to lost-duty days, medical disqualification, and compromises operatio ... Full text Link to item Cite

Upper Extremity Musculoskeletal Characteristics and the Kerlan-Jobe Orthopaedic Clinic Questionnaire Score in Collegiate Baseball Athletes.

Journal Article J Athl Train · September 2019 CONTEXT: Upper extremity (UE) musculoskeletal injuries are common in baseball athletes due to the increased demand placed on the UE. The link between risk factors for UE musculoskeletal injuries and baseball athletes' perceived UE function and pain, as mea ... Full text Link to item Cite

The Association Between Passing Return-to-Sport Criteria and Second Anterior Cruciate Ligament Injury Risk: A Systematic Review With Meta-analysis.

Journal Article J Orthop Sports Phys Ther · February 2019 BACKGROUND: There is no consensus on the components of return-to-sport (RTS) testing following anterior cruciate ligament (ACL) reconstruction or whether passing RTS criteria can reduce a patient's risk of reinjury. OBJECTIVES: To determine whether imparti ... Full text Link to item Cite

Point of Care Quantitative Assessment of Muscle Health in Older Individuals: An Investigation of Quantitative Muscle Ultrasound and Electrical Impedance Myography Techniques.

Journal Article Geriatrics (Basel) · December 16, 2018 Background: Muscle health is recognized for its critical role in the functionality and well-being of older adults. Readily accessible, reliable, and inexpensive methods of measuring muscle health are needed to advance research and clinical care. Methods: I ... Full text Link to item Cite

Shoulder Range of Motion and Baseball Arm Injuries: A Systematic Review and Meta-Analysis.

Journal Article J Athl Train · December 2018 OBJECTIVE: Arm injuries in baseball players are a common problem. The identification of modifiable risk factors, including range of motion (ROM), is essential for injury prevention. The purpose of this review was to assess the methodologic quality and leve ... Full text Link to item Cite

Outcomes After Arthroscopic Rotator Interval Closure for Shoulder Instability: A Systematic Review.

Journal Article Arthroscopy · November 2018 PURPOSE: (1) To systematically assess the clinical outcomes of arthroscopic rotator interval closure (RIC) procedures for shoulder instability and (2) to report the different technical descriptions and surgical indications for this procedure. METHODS: Two ... Full text Link to item Cite

The clinical and radiographic impact of center of rotation lateralization in reverse shoulder arthroplasty: a systematic review.

Journal Article J Shoulder Elbow Surg · November 2018 BACKGROUND: Reverse shoulder arthroplasty (RSA) has been widely adopted in the United States since its approval by the United States Food and Drug Administration in 2003. Advancements in metallurgy and design (including locking screws) have yielded clinica ... Full text Link to item Cite

Postural stability deficit could predict ankle sprains: a systematic review.

Journal Article Knee Surg Sports Traumatol Arthrosc · October 2018 PURPOSE: To perform a systematic review aimed to determine (1) if the postural stability deficit represents a risk factor for ankle sprains; (2) the most effective postural stability evaluation to predict ankle sprains and (3) eventual confounding factors ... Full text Link to item Cite

Neuromuscular differences between men and women

Chapter · September 7, 2018 Anterior cruciate ligament (ACL) injury prevention strategies have not always been successful. The identification of modifiable risk factors for injury is an important step in the injury prevention process. The gender differences observed in ACL injury rat ... Full text Cite

Relationship of performance on the sensory organization test to landing characteristics.

Journal Article J Sports Sci · May 2018 Jump landing tasks have been used to assess landing characteristics and require significant sensorimotor feedback to maintain functional joint stability (FJS) throughout the task. Postural stability (PS) also requires significant sensorimotor feedback and ... Full text Link to item Cite

Reliability, discriminant validity and sex comparisons of dynamic postural stability during a landing task designed to challenge transverse plane knee stability.

Journal Article Sports Biomech · June 2021 Internal and external rotational knee stability is essential for sports performance and excessive rotation can lead to injury but is rarely assessed in injury risk analysis. The objectives of this study were to determine the between-session reliability, di ... Full text Link to item Cite

The Relationship Between Hip Strength and Postural Stability in Collegiate Athletes Who Participate in Lower Extremity Dominant Sports.

Conference Int J Sports Phys Ther · February 1, 2021 BACKGROUND: Lower extremity (LE) injuries are common across many sports. Both core strength (including hip strength) deficits and poor postural stability have been linked to lower extremity (LE) injury. The relationship between these two characteristics is ... Full text Link to item Cite

Hop Testing Lacks Strong Association With Key Outcome Variables After Primary Anterior Cruciate Ligament Reconstruction: A Systematic Review.

Journal Article Am J Sports Med · February 2020 BACKGROUND: Single-legged hop tests are commonly used assessments in return to sport (RTS) testing after anterior cruciate ligament reconstruction (ACLR). Although these tests are commonly used, their predictive validity has not yet been established. PURPO ... Full text Link to item Cite

Sex differences in lower extremity musculoskeletal and neuromuscular characteristics in intercollegiate soccer athletes

Journal Article Science and Medicine in Football · January 2, 2020 Purpose: Establishing sex-specific musculoskeletal characteristics promotes specific and effective injury prevention. The purpose was to identify sex differences in musculoskeletal characteristics in soccer athletes.Methods: 80 collegiate male and female s ... Full text Cite

Postural Stability Under Dual-Task Conditions: Development of a Post-Concussion Assessment for Lower-Extremity Injury Risk.

Journal Article J Sport Rehabil · January 1, 2020 CONTEXT: Concussions are consequence of sports participation. Recent reports indicate there is an increased risk of lower-extremity musculoskeletal injury when returning to sport after concussion suggesting that achieving "normal" balance may not fully ind ... Full text Link to item Cite

Examining the link between thoracic rotation and scapular dyskinesis and shoulder pain amongst college swimmers.

Journal Article Phys Ther Sport · November 2019 OBJECTIVES: In National Collegiate Athletic Association Division I swimmers, we examined the differences in thoracic spine rotation in swimmers with and without scapular dyskinesis and the relationship between thoracic spine rotation and shoulder pain/dysf ... Full text Link to item Cite

The Warrior Model for Human Performance Optimization.

Journal Article Sports Med Arthrosc Rev · September 2019 Special Operations Combat Personnel (SOCP) face significant challenges and occupational demands that put them at significant risk for musculoskeletal injury. Musculoskeletal injury leads to lost-duty days, medical disqualification, and compromises operatio ... Full text Link to item Cite

Upper Extremity Musculoskeletal Characteristics and the Kerlan-Jobe Orthopaedic Clinic Questionnaire Score in Collegiate Baseball Athletes.

Journal Article J Athl Train · September 2019 CONTEXT: Upper extremity (UE) musculoskeletal injuries are common in baseball athletes due to the increased demand placed on the UE. The link between risk factors for UE musculoskeletal injuries and baseball athletes' perceived UE function and pain, as mea ... Full text Link to item Cite

The Association Between Passing Return-to-Sport Criteria and Second Anterior Cruciate Ligament Injury Risk: A Systematic Review With Meta-analysis.

Journal Article J Orthop Sports Phys Ther · February 2019 BACKGROUND: There is no consensus on the components of return-to-sport (RTS) testing following anterior cruciate ligament (ACL) reconstruction or whether passing RTS criteria can reduce a patient's risk of reinjury. OBJECTIVES: To determine whether imparti ... Full text Link to item Cite

Point of Care Quantitative Assessment of Muscle Health in Older Individuals: An Investigation of Quantitative Muscle Ultrasound and Electrical Impedance Myography Techniques.

Journal Article Geriatrics (Basel) · December 16, 2018 Background: Muscle health is recognized for its critical role in the functionality and well-being of older adults. Readily accessible, reliable, and inexpensive methods of measuring muscle health are needed to advance research and clinical care. Methods: I ... Full text Link to item Cite

Shoulder Range of Motion and Baseball Arm Injuries: A Systematic Review and Meta-Analysis.

Journal Article J Athl Train · December 2018 OBJECTIVE: Arm injuries in baseball players are a common problem. The identification of modifiable risk factors, including range of motion (ROM), is essential for injury prevention. The purpose of this review was to assess the methodologic quality and leve ... Full text Link to item Cite

Outcomes After Arthroscopic Rotator Interval Closure for Shoulder Instability: A Systematic Review.

Journal Article Arthroscopy · November 2018 PURPOSE: (1) To systematically assess the clinical outcomes of arthroscopic rotator interval closure (RIC) procedures for shoulder instability and (2) to report the different technical descriptions and surgical indications for this procedure. METHODS: Two ... Full text Link to item Cite

The clinical and radiographic impact of center of rotation lateralization in reverse shoulder arthroplasty: a systematic review.

Journal Article J Shoulder Elbow Surg · November 2018 BACKGROUND: Reverse shoulder arthroplasty (RSA) has been widely adopted in the United States since its approval by the United States Food and Drug Administration in 2003. Advancements in metallurgy and design (including locking screws) have yielded clinica ... Full text Link to item Cite

Postural stability deficit could predict ankle sprains: a systematic review.

Journal Article Knee Surg Sports Traumatol Arthrosc · October 2018 PURPOSE: To perform a systematic review aimed to determine (1) if the postural stability deficit represents a risk factor for ankle sprains; (2) the most effective postural stability evaluation to predict ankle sprains and (3) eventual confounding factors ... Full text Link to item Cite

Neuromuscular differences between men and women

Chapter · September 7, 2018 Anterior cruciate ligament (ACL) injury prevention strategies have not always been successful. The identification of modifiable risk factors for injury is an important step in the injury prevention process. The gender differences observed in ACL injury rat ... Full text Cite

Relationship of performance on the sensory organization test to landing characteristics.

Journal Article J Sports Sci · May 2018 Jump landing tasks have been used to assess landing characteristics and require significant sensorimotor feedback to maintain functional joint stability (FJS) throughout the task. Postural stability (PS) also requires significant sensorimotor feedback and ... Full text Link to item Cite

Anthropometrics are Associated with Static Balance Performance in Intercollegiate Athletes

Conference MEDICINE AND SCIENCE IN SPORTS AND EXERCISE · May 1, 2018 Link to item Cite

Gender Differences in Static and Dynamic Postural Stability of Soldiers in the Army's 101st Airborne Division (Air Assault).

Journal Article J Sport Rehabil · March 1, 2018 CONTEXT: Postural stability is essential for injury prevention and performance. Differences between genders may affect training focus. OBJECTIVE: To examine static and dynamic postural stability in male and female soldiers. DESIGN: Descriptive laboratory s ... Full text Link to item Cite

Accuracy of recall of musculoskeletal injuries in elite military personnel: a cross-sectional study.

Journal Article BMJ Open · December 14, 2017 BACKGROUND: Self-reported data are often used in research studies among military populations. OBJECTIVE: The accuracy of self-reported musculoskeletal injury data among elite military personnel was assessed for issues with recall. DESIGN: Cross-sectional s ... Full text Link to item Cite

Landing Kinematics and Kinetics at the Knee During Different Landing Tasks.

Journal Article J Athl Train · December 2017 CONTEXT:   Several tasks have been used to examine landing biomechanics for evaluation and rehabilitation, especially as related to anterior cruciate ligament injuries. However, comparing results among studies in which different tasks were used can be diff ... Full text Link to item Cite

Physical and Performance Characteristics Related to Unintentional Musculoskeletal Injury in Special Forces Operators: A Prospective Analysis.

Journal Article J Athl Train · December 2017 CONTEXT:   Seventy-seven percent of musculoskeletal injuries sustained by United States Army Special Forces Operators are preventable. Identification of predictive characteristics will promote the development of screening methods to augment injury-preventi ... Full text Link to item Cite

Military personnel with self-reported ankle injuries do not demonstrate deficits in dynamic postural stability or landing kinematics.

Journal Article Clin Biomech (Bristol, Avon) · August 2017 BACKGROUND: The odds of sustaining non-contact musculoskeletal injuries are higher in Special Operations Forces operators than in infantry soldiers. The ankle is one of the most commonly injured joints, and once injured can put individuals at risk for rein ... Full text Link to item Cite

Physical Fitness Predictors Of A Warrior Task Simulation Test

Conference Medicine & Science in Sports & Exercise · May 2017 Full text Cite

Kinesiology taping does not alter shoulder strength, shoulder proprioception, or scapular kinematics in healthy, physically active subjects and subjects with Subacromial Impingement Syndrome.

Journal Article Phys Ther Sport · March 2017 OBJECTIVE: To examine the effect of kinesiology tape (KT) on shoulder strength, proprioception, and scapular kinematics in healthy and Subacromial Impingement Syndrome (SAIS) subjects. DESIGN: Placebo-controlled quasi-experimental study. SETTING: Research ... Full text Link to item Cite

Normative Data for the NeuroCom Sensory Organization Test in US Military Special Operations Forces.

Journal Article J Athl Train · February 2017 CONTEXT: Postural stability is the ability to control the center of mass in relation to a person's base of support and can be affected by both musculoskeletal injury and traumatic brain injury. The NeuroCom Sensory Organization Test (SOT) can be used to ob ... Full text Link to item Cite

Naval Special Warfare (NSW) crewmen demonstrate diminished cervical strength and range of motion compared to NSW students.

Journal Article Work · 2017 BACKGROUND: Cumulative effects of high-impact vertical forces, like those experienced on an open-ocean mission, could be an injury concern for the cervical spine. OBJECTIVE: Compare cervical range of motion (ROM) and strength measures between students and ... Full text Link to item Cite

Effects of Flight-Exposure and Age on Cervical and Trunk Musculoskeletal Characteristics in Army Helicopter Pilots

Journal Article International Journal of Aeronautical Science & Aerospace Research · November 16, 2016 Full text Cite

Effects of Deployment on Musculoskeletal and Physiological Characteristics and Balance.

Journal Article Mil Med · September 2016 Despite many nonbattle injuries reported during deployment, few studies have been conducted to evaluate the effects of deployment on musculoskeletal and physiological characteristics and balance. A total of 35 active duty U.S. Army Soldiers participated in ... Full text Open Access Link to item Cite

Prediction of Dynamic Postural Stability During Single-Leg Jump Landings by Ankle and Knee Flexibility and Strength.

Journal Article J Sport Rehabil · August 2016 CONTEXT: Dynamic postural stability is important for injury prevention, but little is known about how lower-extremity musculoskeletal characteristics (range of motion [ROM] and strength) contribute to dynamic postural stability. Knowing which modifiable ph ... Full text Link to item Cite

Descriptive Epidemiology of Musculoskeletal Injuries in the Army 101st Airborne (Air Assault) Division.

Journal Article Mil Med · August 2016 The purpose of this study was to describe the epidemiology of musculoskeletal injuries among Soldiers of the 101st Airborne (Air Assault) Division. A total of 451 subjects (age: 27.6 ± 6.2 years, gender: males 395/451 = 87.6%) volunteered. Musculoskeletal ... Full text Link to item Cite

Force Sense of the Knee Not Affected by Fatiguing the Knee Extensors and Flexors.

Journal Article J Sport Rehabil · May 2016 CONTEXT: Knee injuries commonly occur in later stages of competition, indicating that fatigue may influence dynamic knee stability. Force sense (FS) is a submodality of proprioception influenced by muscle mechanoreceptors, which, if negatively affected by ... Full text Link to item Cite

Reliability and measurement precision of concentric-to-isometric and eccentric-to-isometric knee active joint position sense tests in uninjured physically active adults.

Journal Article Phys Ther Sport · March 2016 OBJECTIVES: Proprioception is important because it is used by the central nervous system to mediate muscle control of joint stability, posture, and movement. Knee active joint position sense (AJPS) is one representation of knee proprioception. The purpose ... Full text Link to item Cite

The Eagle Tactical Athlete Program Reduces Musculoskeletal Injuries in the 101st Airborne Division (Air Assault).

Journal Article Mil Med · March 2016 UNLABELLED: The Eagle Tactical Athlete Program (ETAP) was scientifically developed for the U.S. Army's 101st Airborne Division (Air Assault) to counter unintentional musculoskeletal injuries (MSIs). PURPOSE: To determine if ETAP would reduce unintentional ... Full text Link to item Cite

The Effect of Target Position on the Accuracy of Cervical-Spine-Rotation Active Joint-Position Sense.

Journal Article J Sport Rehabil · February 2016 CONTEXT: The cervical spine can be divided into upper and lower units, each making a different contribution to the magnitude of rotation and proprioception. However, few studies have examined the effect of the cervical-rotation positions on proprioception. ... Link to item Cite

Effects of Age and Military Service on Strength and Physiological Characteristics of U.S. Army Soldiers.

Journal Article Mil Med · February 2016 Soldiers must maintain tactical performance capabilities over the course of their career. Loss in physical readiness may be a function of age and the operational demands associated with increasing years of service. The purpose of this study was to assess s ... Full text Link to item Cite

Block-Periodized Training Improves Physiological and Tactically Relevant Performance in Naval Special Warfare Operators.

Journal Article J Strength Cond Res · January 2016 Human performance training and prevention strategies are necessary to promote physical readiness and mitigate musculoskeletal injuries of the Naval Special Warfare (NSW) Operator. The purpose of this study was to measure the effectiveness of 2 training pro ... Full text Link to item Cite

Descriptive Epidemiology of Musculoskeletal Injuries in Naval Special Warfare Sea, Air, and Land Operators.

Journal Article Mil Med · January 2016 The purpose of this analysis was to describe medical chart reviewed musculoskeletal injuries among Naval Special Warfare Sea, Air, and Land Operators. 210 Operators volunteered (age: 28.1 ± 6.0 years, height: 1.8 ± 0.1 m, weight: 85.4 ± 9.3 kg). Musculoske ... Full text Open Access Link to item Cite

Aerobic capacity and isometric knee flexion strength fatigability are related to knee kinesthesia in physically active women

Journal Article Isokinetics and Exercise Science · January 1, 2016 BACKGROUND: Fatiguing exercise may impair functional joint stability and increase injury risk. Musculoskeletal and physiological characteristics are related to fatigue, but their relationship with proprioceptive changes following fatigue is unknown. OBJECT ... Full text Cite

Isokinetic strength of fully operational U.S. Navy Seals with a previous history of shoulder and knee injury

Journal Article Isokinetics and Exercise Science · January 1, 2016 BACKGROUND: Unintentional musculoskeletal injury has a significant impact on military personnel which is amplified in U.S. Navy Sea, Air, and Land Operators who participate in year round physical and tactical training. Full recovery from injury including r ... Full text Open Access Cite

A comparison of cervical and trunk musculoskeletal characteristics between female and male army helicopter pilots

Journal Article International Journal of Aviation, Aeronautics, and Aerospace · January 1, 2016 Full text Cite

Postural Stability of Special Warfare Combatant Craft Crewman with Tactical Gear

Journal Article Journal of special operations medicine : a peer reviewed journal for SOF medical professionals · 2016 Cite

The positive correlation between trunk, leg, and shoulder strength and linear bat velocity at different ball locations during the baseball swing in adult baseball hitters

Journal Article Isokinetics and Exercise Science · November 18, 2015 BACKGROUND: Strength of body segments and bat velocity during the baseball swing have been described as positively related, but the relative importance of each body segment's strength and the effect of ball location in the strike zone have not been examine ... Full text Cite

Reliability and validity of medicine ball toss tests as clinical measures of core strength

Journal Article Isokinetics and Exercise Science · August 4, 2015 BACKGROUND: Core strengthening is a significant component of training programs utilized to optimize athletic performance, reduce injury, and facilitate return from injury. Reliable and valid clinical measures of core strength are necessary to determine the ... Full text Cite

Reliability and validity of instrumented soccer equipment.

Journal Article J Appl Biomech · June 2015 Ankle ligament sprains are the most common injury in soccer. The high rate of these injuries demonstrates a need for novel data collection methodologies. Therefore, soccer shoes and shin guards were instrumented with inertial sensors to measure ankle joint ... Full text Link to item Cite

Reliability and validity of an accelerometry based measure of static and dynamic postural stability in healthy and active individuals.

Journal Article Gait Posture · February 2015 Postural stability is an important measure in both research and clinical practice. A portable, easy to use device that can provide higher resolution than current clinical tests may allow for better identification of patients or athletes with postural stabi ... Full text Link to item Cite

Lumbar spine and hip flexibility and trunk strength in helicopter pilots with and without low back pain history.

Journal Article Work · 2015 BACKGROUND: Low back pain (LBP) is one of the most common musculoskeletal issues facing military helicopter pilots. It is clinically important to identify differences in musculoskeletal characteristics between pilots with and without a LBP history for form ... Full text Link to item Cite

Musculoskeletal, biomechanical, and physiological gender differences in the US military.

Journal Article US Army Med Dep J · 2015 UNLABELLED: The repeal of the Direct Ground Combat Assignment Rule has renewed focus on examining performance capabilities of female military personnel and their ability to occupy previously restricted military occupational specialties. Previous research h ... Link to item Cite

Salivary hormone response to 12-week block-periodized training in naval special warfare operators.

Journal Article J Strength Cond Res · January 2015 Naval Special Warfare (NSW) Operators are expected to maintain a high degree of physical readiness requiring continual operational training. The physiological and psychological demands associated with operational training can result in physiological conseq ... Full text Link to item Cite

It's an honor, it's a privilege.

Journal Article Phys Ther Sport · November 2014 Full text Link to item Cite

Injury epidemiology of U.S. Army Special Operations forces.

Journal Article Mil Med · October 2014 Musculoskeletal injuries have long been a problem in general purpose forces, yet anecdotal evidence provided by medical, human performance, and training leadership suggests musculoskeletal injuries are also a readiness impediment to Special Operations Forc ... Full text Link to item Cite

Neck proprioception, strength, flexibility, and posture in pilots with and without neck pain history.

Journal Article Aviat Space Environ Med · May 2014 INTRODUCTION: Neck pain (NP) is common among military helicopter pilots. Older age and more flight-hours have been associated with pilots with a history of NP. However, modifiable neuromuscular and musculoskeletal characteristics such as neck proprioceptio ... Full text Link to item Cite

Single-Leg Balance Impairments Persist in Fully Operational Military Special Forces Operators With a Previous History of Low Back Pain.

Journal Article Orthop J Sports Med · May 2014 BACKGROUND: Single-leg balance (SLB) can be chronically impaired after low back pain (LBP). Impaired SLB is a risk factor for recurrent LBP and lower extremity injury. In the United States military, the special forces operator (SFO) deploys on high-risk mi ... Full text Link to item Cite

Relationship between tibial acceleration and proximal anterior tibia shear force across increasing jump distance.

Journal Article J Appl Biomech · February 2014 Proximal anterior tibia shear force is a direct loading mechanism of the anterior cruciate ligament (ACL) and is a contributor to ACL strain during injury. Measurement of this force during competition may provide insight into risk factors for ACL injury. A ... Full text Link to item Cite

Consortium for health and military performance and American College of Sports Medicine Summit: utility of functional movement assessment in identifying musculoskeletal injury risk.

Journal Article Curr Sports Med Rep · 2014 Prevention of musculoskeletal injuries (MSKI) is critical in both civilian and military populations to enhance physical performance, optimize health, and minimize health care expenses. Developing a more unified approach through addressing identified moveme ... Full text Link to item Cite

Restoration of sagittal and transverse plane proprioception following anatomic double-bundle ACL reconstruction.

Journal Article Knee Surg Sports Traumatol Arthrosc · September 2013 PURPOSE: To investigate the restoration of knee proprioception after anatomic double-bundle ACL reconstruction. METHODS: Eleven subjects who underwent anatomic double-bundle ACL reconstruction (12.5-15 months following surgery) and eleven healthy control s ... Full text Link to item Cite

Postural stability and isokinetic strength do not predict knee valgus angle during single-leg drop-landing or single-leg squat in elite male rugby union players

Journal Article Isokinetics and Exercise Science · February 18, 2013 BACKGROUND: Knee injuries have been identified as the most common injury in rugby. Knee valgus has been identified as a risk factor for ligament injuries in athletes and predictors of knee valgus may assist in the design of knee injury prevention programs. ... Full text Cite

Knee proprioception and strength and landing kinematics during a single-leg stop-jump task.

Journal Article J Athl Train · 2013 CONTEXT: The importance of the sensorimotor system in maintaining a stable knee joint has been recognized. As individual entities, knee-joint proprioception, landing kinematics, and knee muscles play important roles in functional joint stability. Preventin ... Full text Link to item Cite

The addition of body armor diminishes dynamic postural stability in military soldiers.

Journal Article Mil Med · January 2013 Poor postural stability has been identified as a risk factor for lower extremity musculoskeletal injury. The additional weight of body armor carried by Soldiers alters static postural stability and may predispose Soldiers to lower extremity musculoskeletal ... Full text Link to item Cite

Reliability, precision, and gender differences in knee internal/external rotation proprioception measurements.

Journal Article Phys Ther Sport · November 2012 OBJECTIVE: To develop and assess the reliability and precision of knee internal/external rotation (IR/ER) threshold to detect passive motion (TTDPM) and determine if gender differences exist. DESIGN: Test-retest for the reliability/precision and cross-sect ... Full text Link to item Cite

Validation of a video-based motion analysis technique in 3-D dynamic scapular kinematic measurements.

Journal Article J Biomech · September 21, 2012 BACKGROUND: Current non-invasive 3-D scapular kinematic measurement techniques such as electromagnetic tracking are subjected to restrictions of wired sensors and limited capture space. Video-based motion analysis provides greater freedom with relatively l ... Full text Link to item Cite

Neuromuscular differences between men and women

Chapter · January 1, 2012 This chapter provides an overview of the neuromuscular differences between male and female athletes participating in sports and recreational activities. Differences are outlined based on the functional joint stability paradigm and include comparisons for p ... Full text Cite

Test-retest reliability and descriptive statistics of geometric measurements based on plantar pressure measurements in a healthy population during gait.

Journal Article Gait Posture · January 2012 Previous studies have demonstrated that pressure, force, area, and time measurements can be reliably collected from pedobaragraphic platforms, but no studies have analyzed geometric measurements. The purpose of this study was to establish the test-retest r ... Full text Link to item Cite

Air assault soldiers demonstrate more dangerous landing biomechanics when visual input is removed.

Journal Article Mil Med · January 2012 Soldiers are subjected to increased risk of musculoskeletal injuries in night operations because of limited visual input. The purpose of this study was to determine the effect of vision removal on lower extremity kinematics and vertical ground reaction for ... Full text Link to item Cite

Running kinematics and shock absorption do not change after brief exhaustive running.

Journal Article J Strength Cond Res · June 2011 Because of the nature of running, the forces encountered require a proper coordination of joint action of the lower extremity to dissipate the ground reaction forces and accelerations through the kinetic chain. Running-related muscle fatigue may reduce the ... Full text Link to item Cite

Scapulohumeral kinematic assessment of the forward kayak stroke in experienced whitewater kayakers.

Journal Article Sports Biomech · June 2011 By understanding the normal humeral and scapular kinematics during the kayak stroke, inferences about the relationship of kayaking technique and shoulder injury may be established. The purpose of this study was to describe scapular and humeral kinematics a ... Full text Link to item Cite

Less body fat improves physical and physiological performance in army soldiers.

Journal Article Mil Med · January 2011 The purpose of this study was to compare physical and physiological fitness test performance between Soldiers meeting the Department of Defense (DoD) body fat standard (< or = 18%) and those exceeding the standard (> 18%). Ninety-nine male 101st Airborne ( ... Full text Link to item Cite

What is the true evidence for gender-related differences during plant and cut maneuvers? A systematic review.

Journal Article Knee Surg Sports Traumatol Arthrosc · January 2011 PURPOSE: Female athletes have a significantly higher risk of sustaining an anterior cruciate ligament (ACL) injury than male athletes. Biomechanical and neuromuscular factors have been reported as the main cause. The purpose of this review was to criticall ... Full text Link to item Cite

The relationship between biomechanical variables and driving performance during the golf swing.

Journal Article J Sports Sci · September 2010 Swing kinematic and ground reaction force data from 308 golfers were analysed to identify the variables important to driving ball velocity. Regression models were applied at four selected events in the swing. The models accounted for 44-74% of variance in ... Full text Link to item Cite

A comparison of physical characteristics and swing mechanics between golfers with and without a history of low back pain.

Journal Article J Orthop Sports Phys Ther · July 2010 STUDY DESIGN: Controlled laboratory study using a cross-sectional design. OBJECTIVES: To examine the kinematics and kinetics of the trunk and the physical characteristics of trunk and hip in golfers with and without a history of low back pain (LBP). BACKGR ... Full text Link to item Cite

Warrior Model for Human Performance and Injury Prevention: Eagle Tactical Athlete Program (ETAP) Part II.

Journal Article J Spec Oper Med · 2010 INTRODUCTION: Physical training for United States military personnel requires a combination of injury prevention and performance optimization to counter unintentional musculoskeletal injuries and maximize warrior capabilities. Determining the most effectiv ... Full text Link to item Cite

Warrior Model for Human Performance and Injury Prevention: Eagle Tactical Athlete Program (ETAP) Part I.

Journal Article J Spec Oper Med · 2010 INTRODUCTION: Physical training for United States military personnel requires a combination of injury prevention and performance optimization to counter unintentional musculoskeletal injuries and maximize warrior capabilities. Determining the most effectiv ... Full text Link to item Cite

Minimal additional weight of combat equipment alters air assault soldiers' landing biomechanics.

Journal Article Mil Med · January 2010 The additional weight of combat and protective equipment carried by soldiers on the battlefield and insufficient adaptations to this weight may increase the risk of musculoskeletal injury. The objective of this study was to determine the effects of the add ... Full text Link to item Cite

Reliability and precision of hip proprioception methods in healthy individuals.

Journal Article Clin J Sport Med · November 2009 OBJECTIVE: The goal of this study was to establish the intrasession and intersession reliability and precision of threshold to detect passive motion (TTDPM), force sense (FS), and active joint position sense (JPS) tests for the hip in healthy individuals. ... Full text Link to item Cite

Effects of spinal manipulation on trunk proprioception in subjects with chronic low back pain during symptom remission.

Journal Article J Manipulative Physiol Ther · February 2009 OBJECTIVE: The purpose of this study was to examine the immediate effects of spinal manipulative therapy (SMT) on trunk proprioception in subjects with asymptomatic chronic low back pain (CLBP) and determine if those effects lasted 1 week. METHODS: This un ... Full text Link to item Cite

Fatigue alters lower extremity kinematics during a single-leg stop-jump task.

Journal Article Knee Surg Sports Traumatol Arthrosc · April 2008 To examine the kinematic characteristics of the hip and knee during a single-leg stop-jump task before and after exercise-to-fatigue, and to determine if the fatigue response is gender-dependent. Lower extremity kinematic measurements were taken of male an ... Full text Link to item Cite

The role of upper torso and pelvis rotation in driving performance during the golf swing.

Journal Article J Sports Sci · January 15, 2008 While the role of the upper torso and pelvis in driving performance is anecdotally appreciated by golf instructors, their actual biomechanical role is unclear. The aims of this study were to describe upper torso and pelvis rotation and velocity during the ... Full text Link to item Cite

Neuromuscular and biomechanical landing performance subsequent to ipsilateral semitendinosus and gracilis autograft anterior cruciate ligament reconstruction.

Journal Article Knee Surg Sports Traumatol Arthrosc · January 2008 The hamstrings musculature is a vital component of an intricate dynamic knee joint restraint mechanism. However, there is evidence based on research studies suggesting potential deficits to this complex mechanism due to donor site morbidity resulting from ... Full text Link to item Cite

ACL Kinematics

Chapter · 2008 Cite

Predictors of proximal tibia anterior shear force during a vertical stop-jump.

Journal Article J Orthop Res · December 2007 Anterior cruciate ligament (ACL) continues to be a significant medical issue for athletes participating in sports and recreational activities. Biomechanical analyses have determined that anterior shear force is the most direct loading mechanism of the ACL ... Full text Link to item Cite

Strength, flexibility, and balance characteristics of highly proficient golfers.

Journal Article J Strength Cond Res · November 2007 Despite the emergence of golf-specific training programs and training aids, relatively little research has been conducted examining the physical characteristics that are important to golf performance. We studied the strength, flexibility, and balance chara ... Full text Link to item Cite

An eight-week golf-specific exercise program improves physical characteristics, swing mechanics, and golf performance in recreational golfers.

Journal Article J Strength Cond Res · August 2007 The purpose of this study was to determine the effects of an 8-week golf-specific exercise program on physical characteristics, swing mechanics, and golf performance. Fifteen trained male golfers (47.2 +/- 11.4 years, 178.8 +/- 5.8 cm, 86.7 +/- 9.0 kg, and ... Full text Link to item Cite

Neuromuscular and biomechanical characteristics do not vary across the menstrual cycle.

Journal Article Knee Surg Sports Traumatol Arthrosc · July 2007 Research examining the menstrual cycle and its relationship to ACL injury has focused on determining the incidence of ACL injury during the different phases of the menstrual cycle and assessing the changes in neuromuscular and biomechanical characteristics ... Full text Link to item Cite

The effect of direction and reaction on the neuromuscular and biomechanical characteristics of the knee during tasks that simulate the noncontact anterior cruciate ligament injury mechanism.

Journal Article Am J Sports Med · January 2006 BACKGROUND: Jumping and landing tasks that have a change in direction have been implicated as a mechanism of noncontact anterior cruciate ligament injury. Yet, to date, neuromuscular and biomechanical research has focused primarily on straight landing task ... Full text Link to item Cite

Neuromuscular and biomechanical characteristic changes in high school athletes: a plyometric versus basic resistance program.

Journal Article Br J Sports Med · December 2005 BACKGROUND: In order to improve neuromuscular and biomechanical characteristic deficits in female athletes, numerous injury prevention programs have been developed and have successfully reduced the number of knee ligament injuries. However, few have invest ... Full text Link to item Cite

Neuromuscular and biomechanical adaptations of patients with isolated deficiency of the posterior cruciate ligament.

Journal Article Am J Sports Med · July 2005 BACKGROUND: Functional adaptations of patients with posterior cruciate ligament deficiency (grade II) are largely unknown despite increased recognition of this injury. HYPOTHESIS: Posterior cruciate ligament-deficient subjects (grade II, 6- to 10-mm bilate ... Full text Link to item Cite

Maxillofacial fractures and dental trauma in a high school soccer goalkeeper: A case report

Journal Article Journal of Athletic Training · April 1, 2005 Objective: To present the case of a 17-year-old male soccer goalkeeper who sustained maxillofacial fractures and dental trauma after being struck in the face by an opponent's knee. Background: Because of the nature of the sport and a lack of protective hea ... Open Access Cite

On-the-Field Resistance-Tubing Exercises for Throwers: An Electromyographic Analysis.

Journal Article J Athl Train · March 2005 Context: Athletes who throw commonly use rubber-tubing resistance exercises in the field setting to assist with warm-up before throwing. Yet no researchers have described which muscles are being activated or which exercises are most effective during rubber ... Link to item Cite

Concepts and measurement of in vivo tibiofemoral kinematics

Journal Article Operative Techniques in Orthopaedics · January 1, 2005 Recent studies of tibiofemoral kinematics in 6 degrees-of-freedom have given us a new perspective and demonstrated lateral compartmental roll-back centered on a medially oriented axis over a relatively stable medial compartment during functional arcs of sa ... Full text Cite

No acute changes in postural control after soccer heading.

Journal Article Br J Sports Med · October 2004 BACKGROUND: Soccer heading has been proposed as a potential cause of cerebral dysfunction. OBJECTIVE: To examine the acute effects of two types of soccer heading on postural control. METHODS: Collegiate soccer players were randomly assigned to one of four ... Full text Link to item Cite

The Efficacy of Soccer Headgear.

Journal Article J Athl Train · September 2003 OBJECTIVE: The potential for risks associated with chronic soccer heading has led some soccer leagues to mandate the use of soccer headgear. Although manufacturers have designed and promoted these headbands to decrease the forces associated with heading a ... Link to item Cite