Chronic Energy Deficiency : Consequences and Related Issues (International Dietary Energy Consultative Group - IDECG, 1987, 201 pages): The energy requirements of pregnancy and lactation: 3. Methodology: 3.5. Standardized exercise test

Chronic Energy Deficiency : Consequences and Related Issues (International Dietary Energy Consultative Group - IDECG, 1987, 201 pages)

The energy requirements of pregnancy and lactation

3. Methodology

		3.1. Selection of subjects
		3.2. Body weight and body fat
		3.3. Energy intake
		3.4. Basal metabolic rate (BMR)
		3.5. Standardized exercise test
		3.6. Normal daily activity pattern
		3.7. Daily energy expenditure
		3.8. Frequency of measurements

3.5. Standardized exercise test

This was carried out by having each woman, except in the Philippines, walk at a fixed pace on a treadmill. The rate was 3.8 km/h on a level gradient for the women in Scotland, in Holland and in The Gambia, and 3.0 km/h for the women in Thailand and in the Philippines. After one or more initial periods to allow the woman to become accustomed to the exercise, there was a 3-minute "run-in" period when she breathed through the mouthpiece valve before collection of expired air was begun. This was done into a Douglas Bag for two separate 10-minute periods. Analyses were done as for the BMR. A variation of more than 5% between samples meant that a third measurement was done. The mean of all the readings was taken as the exercise metabolic rate.