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.
The UKK Institute, Tampere, FINLAND; Polar Electro Oy, Kempele, FINLAND; and Department of Human Biology, University of Maastricht, THE NETHERLANDS
Submitted for publication December 1996.
Accepted for publication August 1997.
The authors thank Louk Wouters for performing the isotope analyses in Maastricht, and Tuija Pokki, Kirsi Martinsen, Ulla Hakala, and Kirsti Malmivuo for technical assistance in Tampere.
Address for correspondence: Dr. Mikael Fogelholm, The UKK Institute, P.O.B. 30, 33501 Tampere, Finland. E-mail: firstname.lastname@example.org.