Transient VO2 Characteristics in Children at the Onset of Steady-Rate Exercise |
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| Authors: | Patty S Freedson Thomas B Gilliam Stanley P Sady Victor L Katch |
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| Institution: | 1. Institute of Environmental Stress , University of California , Santa Barbara , CA , 93106 , USA;2. Depanment of Physical Education , University of Michigan;3. University of Nebraska , Omaha |
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| Abstract: | Abstract The transient oxygen uptake (VO2) response during the initial phase of exercise was investigated in 28 children (mean age ± SD = 10.2 ± 2.28 years) during constant load submaximum bicycle ergometer exercise (mean power output ± SD = 56 ± 4.0 watts; mean VO2 ± SD = .92 ± .141 mdot] min-1). The VO2 half-time (VO2 - t½) averaged (± SD) 34.8 (± 12.70) sec which is similar to that observed in adults. Examination of the VO2-t ½ response as it related to age (7 to 14 years) showed that younger children attained steady-rate VO2 more quickly than older children (r = .77 between age and VO2-t½, P < .05). Body size, maturational level, exercise intensity, cardiorespiratory factors, and anaerobic potential are suggested as possible factors accounting for the positive age vs VO2-t ½ relationship. |
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| Keywords: | children steady-rate exercise VO2 kinetics body size maturation anaerobic potential |
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