The effect of training on aerobic and anaerobic metabolism during a short exhaustive run

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Abstract
20 yds. and distance runs of 2 miles were designed to stress the capacity for both aerobic and anaerobic metabolism. The training program resulted in a 23% increase in run time for the short exhaustive run. With training no change was observed in the oxygen uptake during the first 30 seconds of the short exhaustive run. However, after the initial 30 second period of metabolic adjustment, the oxygen uptake during the remainder of the run was higher after training. Compared to pretraining test results, post-training there was a 9% increase in oxygen debt and 17% increase in blood lactate concentration. The extra energy needed for the longer post-training run could be attributed to the increased oxygen uptake during the final stages of the run, to increased glycolysis, and to an increased capacity to incur an oxygen debt. ©1969The American College of Sports Medicine...

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