Assessment of energy expenditure in overweight women. Med. Sci. Sports Exerc., Vol. 30, No. 8, pp. 1191-1197, 1998.
Purpose: To compare field measures of average daily energy expenditure (ADEE) against criterion data by the doubly labeled water method (DLW) in overweight women.
Methods: The subjects were 20 overweight (BMI 29.2 ± 3.0 kg·m−2) premenopausal women. Energy expenditure was measured by DLW and by the factorial method (activity diary, two techniques differing by method to obtain resting energy expenditure, REE), heart-rate monitoring (HR, two techniques differing by the FLEX-point to discriminate sedentary and activity HR), accelerometer, and pedometer.
Results: The ADEEDLW was 10.26 ± 1.1 MJ·d−1. The mean bias (ADEE by the alternative minus ADEEDLW) was smallest for the accelerometer (+0.08± 1.63 MJ) and HR-FLEX10 (+0.11 ± 1.67 MJ). The HR-FLEX0 technique (lower FLEX-point) overestimated ADEE by +1.18 (± 1.97 MJ). However, the random error (SD of bias) was smallest for both factorial techniques (REE measured:−0.48 ± 0.81 MJ; REE calculated from the WHO equation: −0.22 ± 0.88 MJ).
Conclusions: The results show that simple factorial methods may assess ADEE with small random errors in populations with a rather narrow range of physical activity. The accelerometer and HR with the higher FLEX-point gave comparable results with smaller bias but larger random error compared with the factorial techniques.