超重和肥胖学龄前儿童的肥胖、心血管及健康相关生活质量指标与清醒时运动行为的重新分配：一项等时数据分析
Adiposity, cardiovascular, and health-related quality of life indicators and the reallocation of waking movement behaviors in preschool children with overweight and obesity: An isotemporal data analysis.
作者信息
Dooley Erin E, Pettee Gabriel Kelley, Kohl Harold W, Durand Casey P, Hoelscher Deanna M, Byrd-Williams Courtney E
机构信息
Risk Factor Assessment Branch, Epidemiology and Genomics Research Program, National Cancer Institute, Rockville, Maryland, United States of America.
Michael & Susan Dell Center for Healthy Living, The University of Texas Health Science Center (UTHealth) School of Public Health in Austin, Austin, Texas, United States of America.
出版信息
PLoS One. 2020 Nov 10;15(11):e0242088. doi: 10.1371/journal.pone.0242088. eCollection 2020.
BACKGROUND
Isotemporal substitution evaluates hypothetical time replacement scenarios of physical movement on health, with few studies conducted among ethnically diverse preschool-aged populations. This study examines the reallocation of waking movement behaviors on adiposity, cardiovascular, and quality of life indicators among low-income, majority Hispanic preschool-aged youth (2-5 years) with overweight.
METHODS
Participants wore an ActiGraph monitor (waist) and completed adiposity, cardiovascular, and health-related quality of life health assessments. Covariates included age, sex, ethnicity, and socioeconomic status. The isotemporal substitution approach was employed to address study aims.
RESULTS
Complete data were available for 131 preschoolers. For boys, reallocating 5 minutes of stationary time with light intensity, moderate to vigorous intensity, or total physical activity showed a relation with beneficial reductions in adiposity indicators; for girls, these relations were statistically null. For boys and girls, reallocating 5 minutes of stationary time [-2.2 (95% CI: -3.7, -0.7) mmHg], light intensity [-2.1 (95% CI: -3.7, -0.7) mmHg], or moderate intensity activity [-2.7 (95% CI: -5.0, -0.4) mmHg] to vigorous intensity activity was related to favorable systolic blood pressure. Reallocating 5 minutes of stationary time to moderate to vigorous intensity activity [0.6 (95% CI: -1.0, -0.1) mmHg] or total physical activity [-0.2 (95% CI: -0.3, -0.01) mmHg] was related to lowered systolic blood pressure. Reallocating 5 minutes of stationary time to moderate to vigorous intensity activity [0.6 (95% CI: -1.1, -0.02) bpm] was related to lowered resting heart rate. No significant results for quality of life were found.
CONCLUSION
Reallocation of time from stationary time to other movement behaviors is associated with several favorable adiposity and cardiovascular health outcomes among preschool children with overweight and obesity.
背景
等时替代法评估身体活动时间替换对健康的假设情景，针对不同种族的学龄前儿童开展的研究较少。本研究探讨低收入、以西班牙裔为主的超重学龄前儿童（2至5岁）清醒时运动行为的重新分配对肥胖、心血管和生活质量指标的影响。
方法
参与者佩戴ActiGraph监测仪（腰部），并完成肥胖、心血管和与健康相关的生活质量健康评估。协变量包括年龄、性别、种族和社会经济地位。采用等时替代法实现研究目的。
结果
131名学龄前儿童有完整数据。对于男孩，将5分钟静止时间重新分配为轻度强度、中度至剧烈强度或总身体活动，与肥胖指标的有益降低有关；对于女孩，这些关系在统计学上无显著意义。对于男孩和女孩，将5分钟静止时间[-2.2（95%置信区间：-3.7，-0.7）mmHg]、轻度强度[-2.1（95%置信区间：-3.7，-0.7）mmHg]或中度强度活动[-2.7（95%置信区间：-5.0，-0.4）mmHg]重新分配为剧烈强度活动，与收缩压降低有关。将5分钟静止时间重新分配为中度至剧烈强度活动[0.6（95%置信区间：-1.0，-0.1）mmHg]或总身体活动[-0.2（95%置信区间：-0.3，-0.01）mmHg]与收缩压降低有关。将5分钟静止时间重新分配为中度至剧烈强度活动[0.6（95%置信区间：-1.1，-0.02）次/分钟]与静息心率降低有关。生活质量方面未发现显著结果。
结论
将静止时间重新分配为其他运动行为与超重和肥胖学龄前儿童的一些有利肥胖和心血管健康结果相关。
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