Relations between daily energy expenditure and body fatness, physical fitness in primary school children using doubly labeled water method and accelerometer
10.7600/jspfsm.62.353
- VernacularTitle:小児の日常生活中におけるエネルギー消費量と体格・体力との連関 −二重標識水法および加速度計法を用いた検討−
- Author:
Satoshi Nakae
;
Yosuke Yamada
;
Misaka Kimura
;
Kazuhiro Suzuki
;
Haruo Ozawa
;
Kazufumi Hirakawa
;
Kojiro Ishii
- Publication Type:Journal Article
- Keywords:
doubly labeled water (DLW);
pupil;
steps per day;
physical activity level;
accelerometry
- From:Japanese Journal of Physical Fitness and Sports Medicine
2013;62(5):353-360
- CountryJapan
- Language:English
-
Abstract:
The relationships between physical activity and childhood body size, low physical fitness epidemic are still unclear. The purpose of this study was to examine the relationship between energy expenditure estimated by doubly labeled water (DLW) method and body fatness, physical fitness in children, and the relationship between physical activity levels and percent time spent in activities. 30 healthy Japanese children (20 boys and 10 girls) participated in this study. The total energy expenditure (TEE) and % body fat were measured by the DLW method over a 6-day period. The physical activity-related energy expenditure (PAEE) was calculated as (TEE × 0.90) – basal metabolic rate (BMR). The physical activity level (PAL) was also calculated as TEE/BMR. The physical fitness tests (8 items) were applied to evaluate fitness, and scores of each test were calculated as overall physical fitness score. The TEE was 2009.8 ± 272.6 kcal/day, the PAEE was 558.4 ± 206.1 kcal/day and the PAL was 1.61 ± 0.18. TEE per weight and PAEE per weight (PAEE/wt) was significantly negatively correlated with % body fat (r = - 0.626; r = - 0.400, respectively). These results suggest that increasing energy expenditure is important for achieving adequate body size. The PAEE/wt was most strongly correlated with physical fitness score (r = 0.680). The PAL was associated with percent time spent of inactivity ( r = -0.506), light-moderate activity ( r = 0.450) and vigorous activity ( r = 0.545). It was suggested that physically active lifestyle would be necessary for childhood health.
