Journal of Applied Physiology
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J Appl Physiol 56: 954-957, 1984;
8750-7587/84 $5.00
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Journal of Applied Physiology, Vol 56, Issue 4 954-957, Copyright © 1984 by American Physiological Society

ARTICLES

Peak oxygen uptake during arm cranking for men and women

R. A. Washburn and D. R. Seals

To determine upper body peak O2 uptake (VO2) in a group of young females and to obtain information on possible sex differences, 40 subjects, 20 females and 20 males, mean age 26 +/- 4 (SD) and 31 +/- 6 yr, respectively, were studied during maximal arm-cranking exercise. Peak values for power output, VO2, minute ventilation (VE), and heart rate (HR) were determined for each subject. In addition, arm-shoulder volume (A-SV) was measured before exercise. Significant differences between males and females (P less than 0.05) were found for peak power output (134 +/- 18 vs. 86 +/- 13 W), peak VO2 expressed in liters per minute (2.55 +/- 0.45 vs. 1.81 +/- 0.36) and milliliters per kilogram per minute (34.2 +/- 5.3 vs. 29.2 +/- 4.9), peak VE (95.4 +/- 14.5 vs. 70.1 +/- 19.2 1 X min-1), and A-SV (3,126 +/- 550 vs. 2,234 +/- 349 ml), whereas peak HR was not significantly different between the two groups (174 +/- 14 vs. 174 +/- 36 beats X min-1). However, when peak VO2 was corrected for arm and shoulder size there was no significant difference between the groups (0.82 +/- 0.13 vs. 0.78 +/- 0.13 ml X ml A-SV-1 X min-1). These results suggest that the observed differences between men and women for peak VO2 elicited during arm cranking when expressed in traditional terms (1 X min-1 and ml X kg-1 X min-1) are a function of the size of the contracting muscle mass and are not due to sex-related differences in either O2 delivery or the O2 utilization capacity of the muscle itself.


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