Aerobic power and pubertal peak height velocity in Belgian XXXX .

@entity1 @entity26 @entity43577
To determine the cardiorespiratory response to maximal exercise before, during and after the pubescent growth spurt, thirty @entity1 were tested at yearly intervals over a period of six consecutive years. For each individual, peak height velocity (PHV) was determined. The age at @entity43577 (X = 13.6 years) was taken as a standard of maturation. The results from all subjects at 1.5 and 0.5 years before and 0.5 and 1.5 years after PHV are presented. The highest @entity26 uptake (VO2) obtained during an incremental bicycle ergometer test to voluntary exhaustion was taken as peak @entity26 uptake (VO2 peak). Across each of the four years studied, mean VO2 peak (min = 49.6; max = 52.5 ml.kg-1.min-1) and mean heart rate (HR) at VO2 peak (min = 190; max = 192) did not change significantly as a function of PHV. On the other hand, the respiratory quotient at VO2 peak increased considerably from mean minima and maxima of 0.99 and 1.01 before PHV to 1.07 and 1.10 after PHV. Ventilatory equivalent for VO2 (VE/VO2), taken as an indicator of ventilatory economy, seemed to be unaffected by the maturation process. The steepest increase in circumpubertal @entity26 pulse was found one year after PHV. Average stability coefficients (r), calculated from the inter-years correlations were high for height (r = 0.95), weight (r = 0.92), HR at VO2 peak (r = 0.74), VO2 peak in 1/min (r = 0.71), @entity26 pulse (r = 0.68) and tidal volume (r = 0.64).
