The effect of a movement-to-music video program on the objectively measured sedentary time and physical activity of preschool-aged children and their mothers: A randomized controlled trial

Regular physical activity (PA) and the avoidance of prolonged sitting are essential for children’s healthy growth, and for the physical and mental wellbeing of both children and adults. In the context of exercise, music may promote behavioral change through increased exercise adherence and participation. The purpose of this study was to determine whether a movement-to-music video program could reduce sedentary behavior (SB) and increase PA in mother-child pairs in the home environment. A randomized controlled trial was conducted in the Pirkanmaa region, Finland, in 2014–2016. The participants consisted of 228 mother-child pairs (child age 5–7 years). The primary outcomes of interest were tri-axial accelerometer-derived SB and PA, which were measured in weeks one (baseline), two, and eight in both the intervention and control groups. Further, the mothers and children in the intervention group used a movement-to-music video program from the beginning of week two to the end of week eight. Secondary outcomes included self-reported screen time. The statistical methods employed comprised an intention-to-treat and linear mixed effects model design. No statistically significant differences between groups were found in primary or secondary outcomes. Among the children in the control group, light PA decreased significantly over time and screen time increased from 89 (standard deviation, SD 37) to 99 (SD 41) min/d. Among mothers and children in the intervention group, no statistical differences were found. In supplementary analysis, the children who stayed at home instead of attending daycare/preschool had on average 25 (95% confidence interval, CI 19–30) min/d more sedentary time and 11 (95% CI 8–14) min/d less moderate-to-vigorous PA than those who were at daycare/preschool. The higher body mass index of mothers was related with 5 (95% CI 2–7) min/d more sedentary time and 1 (95% CI 0–2) min/d less moderate-to-vigorous PA. The movement-to-music video program did not change the objectively measured SB or PA of the mother-child pairs. However, mothers and children seemed to be more sedentary at home, and therefore interventions for decreasing SB and increasing PA should be targeted in the home environment.

规律的体力活动(physical activity, PA)与避免长时间久坐，对儿童的健康成长，以及儿童与成人的身心健康均至关重要。在运动场景中，音乐可通过提升运动依从性与参与度推动行为改变。本研究旨在探究一款随乐运动视频项目，能否在家庭环境中减少母子对的久坐行为(sedentary behavior, SB)并提升其体力活动水平。本研究于2014至2016年在芬兰皮尔卡马地区开展随机对照试验，共纳入228对母子（儿童年龄为5至7岁）。本研究的主要结局指标为三轴加速度计测得的久坐行为与体力活动，干预组与对照组均在第1周（基线）、第2周及第8周开展测量。此外，干预组母子自第2周伊始至第8周结束，均使用该随乐运动视频项目。次要结局指标涵盖自我报告的屏幕使用时长。本研究采用的统计方法包括意向性分析与线性混合效应模型设计。两组在主要及次要结局指标上均未发现统计学显著差异。对照组儿童的轻体力活动随时间显著下降，屏幕使用时长则从每日89分钟（标准差(standard deviation, SD)=37）升至99分钟（SD=41）；干预组母子则未出现此类统计学差异。补充分析显示，相较于就读日托/幼儿园的儿童，留在家中未入园的儿童每日久坐时间平均多出25分钟（95%置信区间(confidence interval, CI)=19–30），中等至高强度体力活动则少11分钟（95% CI=8–14）。母亲体重指数越高，其每日久坐时间多5分钟（95% CI=2–7），中等至高强度体力活动少1分钟（95% CI=0–2）。该随乐运动视频项目并未改变母子对经客观测量得到的久坐行为与体力活动水平。但母子在家庭环境中久坐时间似乎更长，因此减少久坐行为、提升体力活动的干预措施应聚焦于家庭场景。