School of Kinesiology and Health Studies, Queen's University, Kingston, ON K7L 3N6, Canada.
Department of Public Health Sciences, Queen's University, Kingston, ON, Canada.
Appl Physiol Nutr Metab. 2019 Sep;44(9):937-943. doi: 10.1139/apnm-2018-0323. Epub 2019 Jan 17.
Altering the proportion of total physical activity time accumulated while participating in different types of physical activity may influence health. Our objective was to use observational data to estimate whether replacing time from 1 type of physical activity with another is associated with physical and mental health indicators among children. Participants were 385 children aged 10-13 years. They wore a Global Positioning System watch and accelerometer and completed an activity log for 7 days. Data from these instruments was used to estimate time spent in outdoor active play, organized sport, curriculum-based physical activity at school, and active transportation. A cardiometabolic risk factor score was created from body fat, resting heart rate, and resting blood pressure measures. An internalizing symptoms score was created using anxiety and depression symptom questionnaire items. Isotemporal substitution models estimated if health indicators changed when time in 1 type of physical activity was replaced with equivalent time from another. The results indicated that time spent in all types of physical activity combined was associated with the cardiometabolic risk factor and internalizing symptom scores. Replacing active transportation with outdoor active play was associated with an increase in the internalizing symptoms score but a decrease in the cardiometabolic risk factor score. The internalizing symptoms score decreased when active transportation was replaced by equivalent time in organized sport. Other time substitutions were not significant. In conclusion, the total time spent participating in physical activity and not a specific type of physical activity was the most consistent correlate of the health indicators.
改变参与不同类型体育活动时积累的总体育活动时间的比例可能会影响健康。我们的目的是利用观察数据来估计用一种体育活动代替另一种体育活动的时间是否与儿童的身心健康指标有关。参与者为 385 名年龄在 10 至 13 岁的儿童。他们佩戴了全球定位系统手表和加速度计，并完成了为期 7 天的活动日志。这些仪器的数据用于估计户外活跃游戏、有组织的运动、学校基于课程的体育活动和积极交通的时间。从体脂、静息心率和静息血压测量值中创建了一个心血管代谢风险因素评分。使用焦虑和抑郁症状问卷项目创建了一个内化症状评分。等时替代模型估计了当一种类型的体育活动的时间被等量的另一种活动时间替代时，健康指标是否会发生变化。结果表明，所有类型的体育活动总时间的组合与心血管代谢风险因素和内化症状评分有关。将积极交通替换为户外活跃游戏与内化症状评分的增加有关，但与心血管代谢风险因素评分的降低有关。当积极交通被同等时间的有组织运动取代时，内化症状评分下降。其他时间替代则没有显著影响。总之，参与体育活动的总时间，而不是特定类型的体育活动，是与健康指标最一致的相关因素。
