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Cited by 155

The DOI matches its Crossref record; 4 of the 4 references it cites were found in a registry or an index.

Skeletal muscle mass and the reduction ofV˙ o 2 max in trained older subjects

Proctor, David N., Joyner, Michael J.·1997·Journal of Applied Physiology
DOI 10.1152/jappl.1997.82.5.1411
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Abstract

Proctor, David N., and Michael J. Joyner. Skeletal muscle mass and the reduction ofV˙o 2 max in trained older subjects. J. Appl. Physiol.82(5): 1411–1415, 1997.—The role of skeletal muscle mass in the age-associated decline in maximal O 2 uptake (V˙o 2 max ) is poorly defined because of confounding changes in muscle oxidative capacity and in body fat and the difficulty of quantifying active muscle mass during exercise. We attempted to clarify these issues by examining the relationship between several indexes of muscle mass, as estimated by using dual-energy X-ray absorptiometry and treadmillV˙o 2 max in 32 chronically endurance-trained subjects from four groups ( n = 8/group): young men (20–30 yr), older men (56–72 yr), young women (19–31 yr), and older women (51–72 yr).V˙o 2 max per kilogram body mass was 26 and 22% lower in the older men (45.9 vs. 62.0 ml ⋅ kg −1 ⋅ min −1 ) and older women (40.0 vs. 51.5 ml ⋅ kg −1 ⋅ min −1 ). These age differences were reduced to 14 and 13%, respectively, whenV˙o 2 max was expressed per kilogram of appendicular muscle. When appropriately adjusted for age and gender differences in appendicular muscle mass by analysis of covariance, whole bodyV˙o 2 max was 0.50 ± 0.09 l/min less ( P < 0.001) in the older subjects. This effect was similar in both genders. These findings suggest that the reducedV˙o 2 max seen in highly trained older men and women relative to their younger counterparts is due, in part, to a reduced aerobic capacity per kilogram of active muscle independent of age-associated changes in body composition, i.e., replacement of muscle tissue by fat. Because skeletal muscle adaptations to endurance training can be well maintained in older subjects, the reduced aerobic capacity per kilogram of muscle likely results from age-associated reductions in maximal O 2 delivery (cardiac output and/or muscle blood flow).

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Research works printed but not linked: 24

  1. 10.1152/jappl.1989.67.3.1299 · DOI
  2. Buskirk E. R., 1987, Federation Proc., 46, 1824
  3. 10.1152/jappl.1957.11.1.72 · DOI · Paper page
  4. 10.1152/jappl.1992.72.5.1780 · DOI · Paper page
  5. 10.1152/jappl.1990.68.5.1896 · DOI · Paper page
  6. 10.1080/02701367.1981.10607865 · DOI
  7. 10.1123/japa.3.4.324 · DOI
  8. 10.1152/jappl.1995.78.5.1931 · DOI
  9. 10.1152/jappl.1988.65.3.1147 · DOI · Paper page
  10. 10.1093/ajcn/52.2.214 · DOI · Paper page
  11. 10.1249/00005768-199509000-00009 · DOI · Paper page
  12. 10.1016/S0025-6196(12)60695-8 · DOI
  13. 10.1042/cs0410459 · DOI · Paper page
  14. 10.1152/jappl.1992.73.3.1114 · DOI
  15. 10.1249/00005768-199207000-00015 · DOI
  16. 10.1161/01.CIR.86.2.494 · DOI · Paper page
  17. 10.1152/jappl.1996.81.6.2495 · DOI
  18. 10.1097/00005768-199607000-00017 · DOI
  19. 10.1152/jappl.1993.75.2.849 · DOI
  20. 10.1152/jappl.1955.8.1.73 · DOI · Paper page
  21. 10.1152/jappl.1994.77.2.647 · DOI
  22. 10.1152/jappl.1993.75.5.2288 · DOI
  23. 10.1097/00005768-199609000-00019 · DOI
  24. 10.1152/jappl.1996.80.3.824 · DOI · Paper page

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Metadata

Authors
Proctor, D. N., & Joyner, M. J.
Affiliations
Department of Anesthesiology, Mayo Clinic, Rochester, Minnesota 55905
Venue
Journal of Applied Physiology
Publisher
American Physiological Society
Published
1997-05-01
Volume
82
Issue
5
Pages
1411-1415
ISSN
  • 8750-7587
  • 1522-1601
DOI
10.1152/jappl.1997.82.5.1411
Cited by
155
References
4
Language
en

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