CARDIORESPIRATORY ALTERATIONS IN 9-YEAR-OLD TO 11-YEAR-OLD CHILDREN FOLLOWING A SEASON OF COMPETITIVE SWIMMING

  • 1 January 1978
    • journal article
    • research article
    • Vol. 10  (3) , 204-207
Abstract
Cardiorespiratory alterations resulting from 7 mo. of swimming training were described in a group of previously untrained 9-11 yr old children. Members (15) of a competitive swim team served as subjects. A non-training group of 15 children of similar age, height and weight were studied at the same times. All measurements were made on 3 separate days both before and after the training period. On Measurement Day 1 the subjects were measured for VC [vital capacity], FEV1.0 [forced expired volume] and MVV [maximum ventilatory volume]. On Measurement Day 2 they were measured for PWC170 [physical working capacity at a heart rate of 170 beats/min], and on Measurement Day 3 height (cm), weight (kg), .ovrhdot.VEmax [maximum expired volume] (l/min), .ovrhdot.VO2 max [maximum O2 uptake] (ml/kg .cntdot. min) and HRmax [maximum heart rate] were determined. Results indicated that: the mean PWC170 change in the trained children (+ 80.00 kg/min) was significantly greater than that in the reference group (+ 30.00 kgm/min) (P < .05); the mean .ovrhdot.VO2 max change in the experimental group (+ 8.11 ml/kg .cntdot. min) was significantly greater than in the reference group (2.21 ml/kg .cntdot. min) (P < .01); and the mean changes in VC, FEV1.0, MVV, .ovrhdot.VEmax and HRmax were not greater than one would expect to see in normal children of similar age and body dimensions (P > .05).