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The Energy Expenditure of 9- to 11-Year-old Boys and Girls (1) Standing Drawing and (2) Dressing and Undressing

Nutrition Laboratory, Teachers College, Columbia University, New York City, in cooperation with the Bureau of Human Nutrition and Home Economics, United States Department of Agriculture, Washington, D. C.

1. The energy expenditure of 7 boys and 12 girls, 9 to 11 years of age, selected from a home for children and from a private school, has been measured while they were standing drawing and while they were dressing and undressing in a respiration chamber.

2. The average energy expenditure by the boys while standing drawing was found to be 3.19 ± 0.10 Cal. per kilogram of weight per hour with a coefficient of variation of 15.8% and 0.83 ± 0.03 Cal. per centimeter of height per hour with a coefficient of variation of 20.5%. The average energy expenditure by the girls while standing drawing was found to be 2.62 ± 0.05 Cal. per kilogram of weight per hour with a coefficient of variation of 9.6% and 0.63 ± 0.01 Cal. per centimeter of height per hour with a coefficient of variation of 9.5%.

3. The average energy expenditure by the boys while dressing and undressing was found to be 4.29 ± 0.16 Cal. per kilogram of weight per hour with a coefficient of variation of 18.9% and 1.09 ± 0.04 Cal. per centimeter of height per hour with a coefficient of variation of 18.3%. The average energy expenditure by the girls while dressing and undressing was found to be 4.04 ± 0.13 Cal. per kilogram of weight per hour with a coefficient of variation of 18.1% and 1.00 ± 0.03 Cal. per centimeter of height per hour with a coefficient of variation of 14.9%.

Manuscript received 16 February 1948.

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