Approaches to estimating physical activity in the community: calorimetric validation of actometers and heart rate monitoring.
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.
Avons
P
P
Dunn Clinical Nutrition Centre, Cambridge, UK.
Garthwaite
P
P
Davies
H L
HL
Murgatroyd
P R
PR
James
W P
WP
D000328:Adult; D002153:Calorimetry, Indirect; D004734:Energy Metabolism; D006339:Heart Rate; D006801:Humans; D008297:Male; D008991:Monitoring, Physiologic / Q000295:instrumentation*; D005082:Physical Exertion; D012146:Rest