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Expectancy Reduces Symptoms but not Functional Impairment Following Exercise-induced Musculoskeletal Injury.

Publication ,  Journal Article
Hedderson, WC; Dover, GC; George, SZ; Crow, JA; Borsa, PA
Published in: Clin J Pain
January 2018

OBJECTIVES: To quantify the extent to which the participant-provider interaction influences the response to sham treatment following exercised-induced acute musculoskeletal pain. MATERIALS AND METHODS: In total, 40 participants between the ages of 18 and 35 volunteered for the study. Participants came to the laboratory for 3 test sessions 48-hour apart (day 1, 3, and 5). During the initial session, baseline measures were assessed and participants underwent a fatigue protocol for the biceps brachii. Participants were then assigned to a positive expectation or a no-expectation condition before receiving a sham laser therapy treatment. The positive expectation group received symptom improvement priming before their sham treatment. Participants allocated to the no-expectation condition received no feedback before the sham treatment. Maximum voluntary isometric contraction; relaxed elbow angle; visual analog scale; and the QuickDash questionnaire were used as outcome measures. RESULTS: The positive expectation group had a significant reduction in perceived pain compared with the no-expectation group at day 3 follow-up, with the mean scores being 34.65 mm (SE=4.44) compared with 49.4 mm (SE=5.79), respectively. There were no between-group differences with respect to maximum voluntary isometric contraction, QuickDash, or relaxed elbow angle outcomes. In addition, there were no significant between-group differences observed with expected pain on follow-up visits, the effect sizes were d=0.26 on day 1 for day 3 and d=0.51 on day for day 5. DISCUSSION: Positive expectations before a sham treatment enhanced reduction in pain intensity but did not improve functional impairments following exercise-induced acute musculoskeletal injury.

Duke Scholars

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Published In

Clin J Pain

DOI

EISSN

1536-5409

Publication Date

January 2018

Volume

34

Issue

1

Start / End Page

1 / 7

Location

United States

Related Subject Headings

  • Young Adult
  • Self Report
  • Resistance Training
  • Range of Motion, Articular
  • Placebo Effect
  • Pain Measurement
  • Musculoskeletal Pain
  • Muscle Strength
  • Laser Therapy
  • Isometric Contraction
 

Citation

APA
Chicago
ICMJE
MLA
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Hedderson, W. C., Dover, G. C., George, S. Z., Crow, J. A., & Borsa, P. A. (2018). Expectancy Reduces Symptoms but not Functional Impairment Following Exercise-induced Musculoskeletal Injury. Clin J Pain, 34(1), 1–7. https://doi.org/10.1097/AJP.0000000000000484
Hedderson, William C., Geoffrey C. Dover, Steven Z. George, Joshua A. Crow, and Paul A. Borsa. “Expectancy Reduces Symptoms but not Functional Impairment Following Exercise-induced Musculoskeletal Injury.Clin J Pain 34, no. 1 (January 2018): 1–7. https://doi.org/10.1097/AJP.0000000000000484.
Hedderson WC, Dover GC, George SZ, Crow JA, Borsa PA. Expectancy Reduces Symptoms but not Functional Impairment Following Exercise-induced Musculoskeletal Injury. Clin J Pain. 2018 Jan;34(1):1–7.
Hedderson, William C., et al. “Expectancy Reduces Symptoms but not Functional Impairment Following Exercise-induced Musculoskeletal Injury.Clin J Pain, vol. 34, no. 1, Jan. 2018, pp. 1–7. Pubmed, doi:10.1097/AJP.0000000000000484.
Hedderson WC, Dover GC, George SZ, Crow JA, Borsa PA. Expectancy Reduces Symptoms but not Functional Impairment Following Exercise-induced Musculoskeletal Injury. Clin J Pain. 2018 Jan;34(1):1–7.

Published In

Clin J Pain

DOI

EISSN

1536-5409

Publication Date

January 2018

Volume

34

Issue

1

Start / End Page

1 / 7

Location

United States

Related Subject Headings

  • Young Adult
  • Self Report
  • Resistance Training
  • Range of Motion, Articular
  • Placebo Effect
  • Pain Measurement
  • Musculoskeletal Pain
  • Muscle Strength
  • Laser Therapy
  • Isometric Contraction