Wong Jyh Eiin, Palarea-Albaladejo Javier, Lee Shoo Thien, Koh Denise, Khouw Ilse, Poh Bee Koon
Center for Community Health Studies (ReaCH), Faculty of Health Sciences, University Kebangsaan Malaysia, Kuala Lumpur, Malaysia.
Obesity-UKM Research Group, University Kebangsaan Malaysia, Kuala Lumpur, Malaysia.
J Phys Act Health. 2024 Nov 4;22(1):100-111. doi: 10.1123/jpah.2024-0161. Print 2025 Jan 1.
Physical activity (PA), sedentary behavior (SB), and sleep are interrelated 24-hour movement behaviors that are important for the growth and well-being of children. This cross-sectional study examined the relationship between 24-hour movement behaviors and adiposity, and predicted changes in adiposity following compositional time reallocations in 7- to 12.9-year-old Malaysian children from the South East Asian Nutrition Surveys II Malaysia.
A total of 381 children (mean age 9.7 [1.6] y, 57% girls) provided 24-hour wrist-worn GENEActiv accelerometry data which captured time spent for sleep, SB, light PA and moderate to vigorous PA (MVPA). Indicators of adiposity were derived from anthropometry and bioelectrical impedance analysis: body-mass-index-for-age, waist circumference, waist-to-height ratio, percent body fat, and body mass index. The composition of 4-part movement behaviors was expressed as isometric log-ratio coordinates which were entered into regression models. Isotemporal substitution analysis was used to assess changes in adiposity indicators when reallocating time between movement behaviors.
Relative to other movement behaviors, time spent on MVPA was significantly associated with waist circumference, waist-to-height ratio, percent body fat, and fat mass index. A 15-minute one-to-one reallocation from other movement behaviors to MVPA predicted lower body-mass-index-for-age (-0.03 to -0.11), smaller waist circumference (-0.67 to -1.28 cm), lower waist-to-height ratio (-0.004 to -0.008), percent body fat (-0.87% to -1.47%), and fat mass index (-0.23 to -0.42). Replacing SB and light PA with sleep or MVPA was associated with lower adiposity.
The overall composition of movement behavior was significantly associated with the adiposity of Malaysian schoolchildren. Promoting MVPA and sleep and reducing SB and light PA are important for prevention of childhood obesity.
身体活动（PA）、久坐行为（SB）和睡眠是相互关联的24小时运动行为，对儿童的生长和健康至关重要。这项横断面研究调查了7至12.9岁马来西亚儿童24小时运动行为与肥胖之间的关系，并预测了马来西亚第二次东南亚营养调查中儿童在重新分配运动时间后肥胖情况的变化。
共有381名儿童（平均年龄9.7[1.6]岁，57%为女孩）提供了24小时佩戴在手腕上的GENEActiv加速度计数据，该数据记录了睡眠、SB、轻度PA和中度至剧烈PA（MVPA）的时长。肥胖指标来自人体测量和生物电阻抗分析：年龄别体重指数、腰围、腰高比、体脂百分比和体重指数。四部分运动行为的构成以等距对数比坐标表示，并输入回归模型。等时替代分析用于评估在运动行为之间重新分配时间时肥胖指标的变化。
相对于其他运动行为，MVPA时长与腰围、腰高比、体脂百分比和脂肪质量指数显著相关。将15分钟的运动时间从其他运动行为一对一重新分配到MVPA，预测年龄别体重指数降低（-0.03至-0.11），腰围减小（-0.67至-1.28厘米），腰高比降低（-0.004至-0.008），体脂百分比降低（-0.87%至-1.47%），脂肪质量指数降低（-0.23至-0.42）。用睡眠或MVPA替代SB和轻度PA与较低的肥胖率相关。
运动行为的总体构成与马来西亚学童的肥胖显著相关。促进MVPA和睡眠、减少SB和轻度PA对预防儿童肥胖很重要。
