Abstract

The purpose of this study was to describe cardiorespiratory alterations in a group of previously untrained 9-to-11 year old children resulting from seven months of swimming training. Fifteen members of a competitive swim team served as subjects. A nontraining group of fifteen children of similar age, height and weight were studied at the same times. All measurements were made on three separate days both before and after the training period. On measurement day one the subjects were measured for VC, FEV1.0, and MVV. On measurement day two they were measured for PWC170 and on measurement day three heigth (cm), weight(kg), VE max (l/min), V02 max (ml/kg.min) and HR max were determined. Results of the analyses indicated that: (1) the mean PWC170 change in the trained children (+ 80.00 kgm/min) was significantly greater than in the reference group (+ 30.00 kgm/min) (P .05); (2) the mean V02 max change in the experimental group (+ 8.11 ml/kg.min) was significantly greater than in the reference group (2.21 ml/kg.min) (P .01); and the mean changes in VC, FEV1,0, MVV,VE max, and HR max were not greater than one would expect to see in normal children of similar age and body dimensions (P .05)rat