The influence of physical activity-induced energy expenditure on the variance in body weight change among individuals during a diet intervention

Tomoaki Matsuo; Tomohiro Okura; Yoshio Nakata; Noriko Yabushita; Shigeharu Numao; Hiroyuki Sasai; Kiyoji Tanaka

doi:10.1016/j.orcp.2007.02.003

The influence of physical activity-induced energy expenditure on the variance in body weight change among individuals during a diet intervention

Obes Res Clin Pract. 2007 May;1(2):I-II. doi: 10.1016/j.orcp.2007.02.003.

Authors

Tomoaki Matsuo¹, Tomohiro Okura², Yoshio Nakata², Noriko Yabushita², Shigeharu Numao², Hiroyuki Sasai², Kiyoji Tanaka²

Affiliations

¹ Center for TARA (Tsukuba Advanced Research Alliance), University of Tsukuba, Japan. Electronic address:[email protected].
² Center for TARA (Tsukuba Advanced Research Alliance), University of Tsukuba, Japan.

PMID: 24351451
DOI: 10.1016/j.orcp.2007.02.003

Abstract

Objective: We investigated the relationship between the variability in body weight change among individuals and diet restriction or physical activity during a 14-week intervention.

Design: A prospective clinical trial with a 14-week weight reduction intervention design. In total, 90 middle aged, Japanese, obese women enrolled as subjects.

Measurements: The outcome variable was the change in body weight during the intervention period. Other primary variables were total energy intake, carbohydrate intake, fat intake, protein intake, total energy expenditure (TEE), and activity energy expenditure (AEE). Diet intake was assessed by 3 days, weighed dietary records and dietary recall interviews. Physical activity was assessed by a uniaxial accelerometry sensor and a diary of exercise.

Results: Significant reductions were observed in body weight (-8.5 kg) as a result of intervention. When the subjects were assigned to three categories depending on AEE during intervention, the loss of body weight was significantly greater for subjects within the upper (-9.6 kg) AEE category than for those in the middle (-8.5 kg) or lower AEE (-7.5 kg) categories. In addition, a significant correlation (r = 0.57, p < 0.0001) was observed between a subject's AEE before and during the intervention. On the other hand, no significant correlation was observed between body weight reduction and energy intake, indicating that strict diet restriction does not always result in a large weight loss.

Conclusion: Activity energy expenditure, not only through voluntary exercise but also through spontaneous, daily, physical activities can have a positive effect on reducing body weight.