Effects of high-intensity strength training on cardiovascular function

Abstract

T the same evaluation procedures as the training group. Maximal oxygen uptake (Vo2max), cardiac output during submaximal exercise, and body composition were determined before and after training. In addition, the physiological responses to an acute training session were evaluated. Muscular strength increased markedly, as evidenced by a 44% average in crease in the “one-repetition maximum” in the various exercises. Body weight and percent body fat did not change with training, though fat-free weight did increase (66.9 ± 2.6 vs 68.8 ± 2.7 kg, P<0.05) significantly. Maximal oxygen uptake did not change significantly in either the training or the control group, and there were no changes in the hemodynamic responses to submaximal exercise after training. These findings indicate, therefore, that high-intensity, variable-resistance strength training produces no adaptative improvement in cardiovascular function. The physiological responses measured during a training session provide evidence that this lack of cardiovascular adaptation may be due to the low percentage of Vo2max elicited by this form of exercise. ©1984The American College of Sports Medicine...