Centre for Physical Activity and Nutrition Research, Deakin University, Australia.
J Phys Act Health. 2010 Nov;7 Suppl 3:S299-306. doi: 10.1123/jpah.7.s3.s299.
Physical activity and sedentary behavior (performed primarily while sitting) play a key role in the current and future health of young people. Most health evidence and intervention strategies targeting reductions in children's sedentary behavior have focused on television viewing, with mixed evidence as to the effectiveness of these strategies and of the importance of television viewing for children's health. Evidence from studies with adults using objective measures of sedentary behavior suggests that accumulated sedentary time is independently associated with metabolic health; importantly, emerging evidence suggests that the manner in which the sedentary behavior is accrued (ie, frequency of interruptions to time spent sedentary) may also have independent effects on health. Potential novel intervention approaches to reduce children's sedentary time include activity breaks during class time at school, delivery of active lessons and homework, and changes to the classroom environment. Further evidence of the importance of sedentary time (both total accumulation and frequency of interruptions) on children's health is required. Future studies should assess the effectiveness of interventions targeting organizational and pedagogical changes in schools as well as using homework to engage with families in more active ways.
身体活动和久坐行为（主要在坐着时进行）对年轻人当前和未来的健康起着关键作用。大多数针对减少儿童久坐行为的健康证据和干预策略都集中在看电视上，这些策略的有效性以及电视对儿童健康的重要性存在混合证据。使用久坐行为的客观测量方法对成年人进行的研究证据表明，累积的久坐时间与代谢健康独立相关；重要的是，新出现的证据表明，久坐行为的累积方式（即，坐着时间中断的频率）也可能对健康产生独立影响。减少儿童久坐时间的潜在新干预方法包括在学校上课时安排活动休息、提供积极的课程和作业，以及改变教室环境。需要进一步证明久坐时间（总积累和中断频率）对儿童健康的重要性。未来的研究应评估针对学校组织和教学变化的干预措施的有效性，以及利用家庭作业以更积极的方式与家庭合作。
