Abstract
A continuous treadmill test with four consecutive work loads was employed to estimate VO2Máx. in a sample of 147 male adolescents of medium to low socioeconomic level. The sample was stratified according to the degree of maturation of external genitalia (GMGE) according Tanner's Standards. VO2Máx. (1/min) increased progressively and significantly from 1.6+0.3 1/min for subjects with GMGE=1 to 2.8+0.5 1/min for those with GMGE=5. Average VO2Máx was 46+7 ml/kg/min and 55+8 ml/Kg LBM/min respectively, without variations with GMGE. Positive correlations (R > 0.8; p < 0.001) were found between VO2Máx (1/min) and Wt, Ht, Wt, Ht2; LBM and leg circumference. Also positive and significant correlations with R values between 0.7 and 0.8 were found for tigh circumference, lean arm area. Correlations also significant with R values between 0.3 and 0.6 were found for total energy expenditure, plasma cooper and hemoglobin levels, mean corpuscular volume and for dietary intake of B vitamins and iron. VO2Máx in ml/kg LBM/min ranges between 30 and 80 ml; although subjects in first quartile for this parameter do not differ at all in body size and composition with those in the fourth quartile. The only difference between the two groups was the cardiac rate during the three last work loads in the treadmill test wich were significantly higher for subjects in the first quartile for VO2Máx (ml/kg LBM/min). This can be attributed to genetic endowment or a higher physical activity level, although the latter (obtained from daily record of activities) did not correlate with VO2Máx.
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Riumalló, J., Barrera, G. & Gattas, V. 10. MAXIMAL PHYSICAL CAPACITY (VO2Max) IN CHILEAN MALE ADOLESCENT ACCORDING TO SEXUAL MATURATION (GMGE), BODY COMPOSITION, NUTRITIONAL SITUATION AND PHYSICAL ACTIVITY LEVEL. Pediatr Res 23, 648 (1988). https://doi.org/10.1203/00006450-198806000-00033
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DOI: https://doi.org/10.1203/00006450-198806000-00033