AEROBIC PARAMETERS OF EXERCISE AS A FUNCTION OF BODY SIZE DURING GROWTH IN CHILDREN
AEROBIC PARAMETERS OF EXERCISE AS A FUNCTION OF BODY SIZE DURING GROWTH IN CHILDREN
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DOI：
10.1152/jappl.1984.56.3.628
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发表时间：
1984-01-01
影响因子：
3.3
通讯作者：
WASSERMAN, K
中科院分区：
文献类型：
--
作者：
COOPER, DM;WEILERRAVELL, D;WASSERMAN, K
To examine the relationship between body weight in children and aerobic parameters of exercise, the anaerobic threshold (AT), maximum O2 uptake (.ovrhdot.VO2 max), work efficiency, and response time for O2 uptake (RT-.ovrhdot.VO2) were determined in 109 healthy children (51 girls and 58 boys, range 6-17 yr old) using a cross-sectional study design. Gas exchange during exercise was measured breath by breath. The protocol consisted of cycle ergometry and a linearly increasing work rate (ramp) to the limit of the subject''s tolerance. Both AT and .ovrhdot.VO2 max increased systematically with body weight, whereas work efficiency and RT-.ovrhdot.VO2 were virtually independent of body size. The ratio of AT to .ovrhdot.VO2 max decreased slightly with age, and its mean value was 60%. AT scaled to body weight to the power of 0.92, not significantly different from the power of 1.01 for .ovrhdot.VO2 max. Thus both the AT and the .ovrhdot.VO2 max increase in a highly ordered manner with increasing size, and as judged by AT/.ovrhdot.VO2 max, the onset of anaerobic metabolism during exercise occurred at a relatively constant proportion of the overall limit of the gas transport system. In children cardiorespiratory responses to exercise are regulated at optimized values despite overall change in body size during growth.
