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

1969; Lippincott Williams & Wilkins; Volume: 1; Issue: 2 Linguagem: Inglês

10.1249/00005768-196906000-00002

1530-0315

David A. Cunningham, John A. Faulkner,

Genetics and Physical Performance

Aerobic and anaerobic metabolism during a short exhaustive run was studied in 8 males before and after training. The short exhaustive run was performed on a treadmill at a speed of 8 mph and a grade of 20%. Run times ranged from 36 to 66 seconds. A 6 week training program of interval sprints of 220 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.