Approaches to estimating physical activity in the community: calorimetric validation of actometers and heart rate monitoring

Avons, P.; Garthwaite, P. H.; Davies, H. L.; Murgatroyd, P. R. and James, W. P. (1988). Approaches to estimating physical activity in the community: calorimetric validation of actometers and heart rate monitoring. European Journal of Clinical Nutrition, 42(3) pp. 185–196.

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Abstract

The relationship between actometer measurements, heart rate monitoring and energy expenditure during exercise and resting periods was assessed in a whole-body indirect calorimeter on 12 young male volunteers. Equations derived from these studies were applied to actometer measurements taken during a further 7 d recording in free-living conditions to predict daily energy expenditure over 1 week on an individual basis. Actometers proved to be a satisfactory means of estimating energy expenditure and heart rate monitoring improved the estimates in a few selected subjects. Indirect measures of energy expenditure could be developed by this approach but individual calibration is essential.

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