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Aerobic exercise training can reverse age-related peripheral circulatory changes in healthy older men.

Publication ,  Journal Article
Beere, PA; Russell, SD; Morey, MC; Kitzman, DW; Higginbotham, MB
Published in: Circulation
September 7, 1999

BACKGROUND: The age-related decline in maximal oxygen consumption is attenuated by habitual aerobic exercise. However, the relative effects of training on central and peripheral responses to exercise in older subjects are not known. The present study assessed the contribution of central and peripheral responses to the age-associated decline in peak oxygen consumption and compared the effect of exercise training in healthy older and younger subjects. METHODS AND RESULTS: Ten older and 13 younger men underwent invasive measurement of central and peripheral cardiovascular responses during an upright, staged cycle exercise test before and after a 3-month period of exercise training with cycle ergometry. At baseline, cardiac output and AV oxygen difference during exercise were significantly lower in older subjects. With training, the older and younger groups increased maximal oxygen consumption by 17.8% and 20.2%, respectively. Peak cardiac output was unchanged in both groups. Systemic AV oxygen difference increased 14.4% in the older group and 14.3% in the younger group and accounted for changes in peak oxygen consumption. Peak leg blood flow increased by 50% in older subjects, whereas the younger group showed no significant change. There was no change in peak leg oxygen extraction in the older group, but in the younger group, leg AV oxygen difference increased by 15.4%. CONCLUSIONS: These findings suggest that the age-related decline in maximal oxygen consumption results from a reversible deconditioning effect on the distribution of cardiac output to exercising muscle and an age-related reduction in cardiac output reserve.

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Published In

Circulation

DOI

EISSN

1524-4539

Publication Date

September 7, 1999

Volume

100

Issue

10

Start / End Page

1085 / 1094

Location

United States

Related Subject Headings

  • Regional Blood Flow
  • Reference Values
  • Physical Education and Training
  • Oxygen Consumption
  • Oxygen
  • Middle Aged
  • Male
  • Leg
  • Humans
  • Hemodynamics
 

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Beere, P. A., Russell, S. D., Morey, M. C., Kitzman, D. W., & Higginbotham, M. B. (1999). Aerobic exercise training can reverse age-related peripheral circulatory changes in healthy older men. Circulation, 100(10), 1085–1094. https://doi.org/10.1161/01.cir.100.10.1085
Beere, P. A., S. D. Russell, M. C. Morey, D. W. Kitzman, and M. B. Higginbotham. “Aerobic exercise training can reverse age-related peripheral circulatory changes in healthy older men.Circulation 100, no. 10 (September 7, 1999): 1085–94. https://doi.org/10.1161/01.cir.100.10.1085.
Beere PA, Russell SD, Morey MC, Kitzman DW, Higginbotham MB. Aerobic exercise training can reverse age-related peripheral circulatory changes in healthy older men. Circulation. 1999 Sep 7;100(10):1085–94.
Beere, P. A., et al. “Aerobic exercise training can reverse age-related peripheral circulatory changes in healthy older men.Circulation, vol. 100, no. 10, Sept. 1999, pp. 1085–94. Pubmed, doi:10.1161/01.cir.100.10.1085.
Beere PA, Russell SD, Morey MC, Kitzman DW, Higginbotham MB. Aerobic exercise training can reverse age-related peripheral circulatory changes in healthy older men. Circulation. 1999 Sep 7;100(10):1085–1094.

Published In

Circulation

DOI

EISSN

1524-4539

Publication Date

September 7, 1999

Volume

100

Issue

10

Start / End Page

1085 / 1094

Location

United States

Related Subject Headings

  • Regional Blood Flow
  • Reference Values
  • Physical Education and Training
  • Oxygen Consumption
  • Oxygen
  • Middle Aged
  • Male
  • Leg
  • Humans
  • Hemodynamics