Division of Sports and Rehabilitation Medicine, Ulm University Hospital, 89075 Ulm, Germany.
Institute for Epidemiology and Medical Biometry, Ulm University, 89075 Ulm, Germany.
Int J Environ Res Public Health. 2020 Dec 3;17(23):9029. doi: 10.3390/ijerph17239029.
Sedentary behaviour (SB) in children is related to negative health consequences that can track into adulthood. The programme "Join the Healthy Boat" promotes reduced screen time and a less sedentary lifestyle in schoolchildren. This study investigated the effects of the programme on children's SB. For one year, teachers delivered the programme. A total of 231 children (7.0 ± 0.6 years) participated in the cluster-randomised study; there were 154 one year later at follow-up. Children's SB was assessed using multi-sensor accelerometery, screen time via parental questionnaire. Effects were analysed using (linear) mixed effects regression models. At baseline, children spent 211 (±89) min daily in SB, at follow-up 259 (±109) min/day with no significant difference between the intervention (IG) and control group (CG). SB was higher during weekends ( < 0.01, for CG and IG). However, at follow-up, daily screen time decreased in IG (screen time of >1 h/day: baseline: 33.3% vs. 27.4%; follow-up: 41.2% vs. 27.5%, for CG and IG, respectively). This multi-dimensional, low-threshold intervention for one year does not seem to achieve a significant reduction in children's SB, although screen time decreased in IG. Therefore, it should be considered that screen time cannot be the key contributor to SB and should not solely be used for changing children's SB. However, if screen time is targeted, interventions should promote the replacement of screen time with active alternatives.
儿童久坐行为与负面健康后果有关，这些后果可能会持续到成年期。“加入健康之船”计划旨在减少学童的屏幕时间和减少久坐行为。本研究调查了该计划对儿童久坐行为的影响。在一年的时间里，教师实施了该计划。共有 231 名儿童（7.0±0.6 岁）参与了这项整群随机研究；一年后有 154 名儿童接受了随访。使用多传感器加速度计评估儿童的久坐行为，通过家长问卷评估屏幕时间。使用（线性）混合效应回归模型分析效果。在基线时，儿童每天有 211（±89）分钟处于久坐行为中，随访时为 259（±109）分钟，干预组（IG）和对照组（CG）之间没有显著差异。周末的久坐行为更高（<0.01，CG 和 IG）。然而，在随访时，IG 中每天的屏幕时间减少（每天>1 小时的屏幕时间：基线：33.3%比 27.4%；随访：41.2%比 27.5%，CG 和 IG 分别）。这项为期一年的多维、低门槛干预措施似乎并没有显著减少儿童的久坐行为，尽管 IG 中屏幕时间减少了。因此，应该考虑到屏幕时间不能成为久坐行为的主要原因，也不应该仅仅用于改变儿童的久坐行为。然而，如果以屏幕时间为目标，干预措施应该促进用积极的活动替代屏幕时间。
