PHYSICAL TRAINING IN RELATION TO THE ENERGY EXPENDITURE OF WALKING AND TO FACTORS CONTROLLING RESPIRATION DURING EXERCISE

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Abstract
In cloven National Service men during their preliminary training course there was ft decrease in energy expenditure and ‘ vertical work ’ done in walking at 3½ m.p.h. This is attributed to increased economy of movement since the ratio of energy expended to ‘ work ’ done remained constant. The reduction in exercise ventilation on switching the inspired gas from air to oxygen also decreased over the training period, suggesting improved oxygenation of the blood in the lungs. There was no concurrent change in pulmonary diffusing capacity or ventilation equivalent. No experimental evidence was obtained to support the hypothesis that as a result of this training the body temperature rises less on exercise and that this contributes to the changes in exercise ventilation