Energy expenditures and heart rates of Cambridge boys at school

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Abstract
The energy expenditure of 54 primary school boys in Cambridge, England, was measured for 3 to 5 days during classes, and organized and unorganized play, using a technique that does not interfere with usual activities. The measurement of weight, height, and skin folds indicated the boys were on the high side of normal for both height and weight as judged by British standards. The central tendency of classroom activities was 2.1 to 2.7 kcal/min and of the lunch play period 3.0 kcal/min. There was no significant difference between the energy expenditures of the fattest and leanest children of the group. The school program and types of games are described.