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Abstract
Exercise studies were performed on 15 individuals before and after a winter field maneuver. Oxygen uptake (max [vdot]o2) and and heart rate (HR) were measured during submaximal and maximal exercise on a bicycle ergometer. The mean max [vdot]o2 of the group was 43 ml/kg × min. During the ten- day maneuver the subjects traveled six miles per day. The maximum rate of walking was 3.0 mph, and no high intensity work was performed. The postmaneuver data indicated a distinct increase in physical fitness with an increase in max [vdot]o2 of 6.8% and a decrease in HR at submaximal work loads. The results suggest that low intensity, nonfatiguing exercise of long duration can result in improvement of the order of magnitude observed with high intensity training, even in nonsedentary subjects.