Hankonen Nelli, Heino Matti T J, Araujo-Soares Vera, Sniehotta Falko F, Sund Reijo, Vasankari Tommi, Absetz Pilvikki, Borodulin Katja, Uutela Antti, Lintunen Taru, Haukkala Ari
School of Social Sciences and Humanities, University of Tampere, Kalevankatu 4, 33014, Tampere, Finland.
Faculty of Social Sciences, University of Helsinki, Helsinki, Finland.
BMC Public Health. 2016 May 27;16:451. doi: 10.1186/s12889-016-3094-x.
Physical activity (PA) has been shown to decline during adolescence, and those with lower education have lower levels of activity already at this age, calling for targeted efforts for them. No previous study has demonstrated lasting effects of school-based PA interventions among older adolescents. Furthermore, these interventions have rarely targeted sedentary behaviour (SB) despite its relevance to health. The Let's Move It trial aims to evaluate the effectiveness and the cost-effectiveness of a school-based, multi-level intervention, on PA and SB, among vocational school students. We hypothesise that the intervention is effective in increasing moderate-to-vigorous-intensity physical activity (MVPA), particularly among those with low or moderate baseline levels, and decreasing SB among all students.
The design is a cluster-randomised parallel group trial with an internal pilot study. The trial is conducted in six vocational schools in the Helsinki Metropolitan area, Finland. The intervention is carried out in 30 intervention classes, and 27 control classes retain the standard curriculum. The randomisation occurs at school-level to avoid contamination and to aid delivery. Three of the six schools, randomly allocated, receive the 'Let's Move It' intervention which consists of 1) group sessions and poster campaign targeting students' autonomous PA motivation and self-regulation skills, 2) sitting reduction in classrooms via alterations in choice architecture and teacher behaviour, and 3) enhancement of PA opportunities in school, home and community environments. At baseline, student participants are blind to group allocation. The trial is carried out in six batches in 2015-2017, with main measurements at pre-intervention baseline, and 2-month and 14-month follow-ups. Primary outcomes are for PA, MVPA measured by accelerometry and self-report, and for SB, sedentary time and breaks in sedentary time (accelerometry). Key secondary outcomes include measured body composition, self-reported well-being, and psychological variables. Process variables include measures of psychosocial determinants of PA (e.g. autonomous motivation) and use of behaviour change techniques. Process evaluation also includes qualitative interviews. Intervention fidelity is monitored.
The study will establish whether the Let's Move It intervention is effective in increasing PA and reducing SB in vocational school students, and identify key processes explaining the results.
ISRCTN10979479 . Registered: 31.12.2015.
研究表明，青少年时期身体活动（PA）水平会下降，而且受教育程度较低的青少年在这个年龄段的活动水平已然较低，因此需要针对他们开展有针对性的工作。此前尚无研究证明以学校为基础的PA干预措施对大龄青少年有持久影响。此外，尽管久坐行为（SB）与健康相关，但这些干预措施很少针对久坐行为。“动起来”试验旨在评估一项以学校为基础的多层次干预措施对职业学校学生的PA和SB的有效性及成本效益。我们假设该干预措施能有效增加中等至剧烈强度身体活动（MVPA），尤其是在基线水平较低或中等的学生中，并能减少所有学生的SB。
该设计为整群随机平行组试验，并设有内部预试验。试验在芬兰赫尔辛基大都市区的六所职业学校进行。干预措施在30个干预班级实施，27个对照班级保留标准课程。随机分组在学校层面进行，以避免干扰并便于实施。六所学校中的三所被随机分配接受“动起来”干预措施，该措施包括：1）针对学生自主PA动机和自我调节技能的小组课程和海报宣传活动；2）通过改变选择架构和教师行为减少课堂上的久坐时间；3）增加学校、家庭和社区环境中的PA机会。在基线时，学生参与者对分组情况不知情。试验在2015 - 2017年分六批进行，主要测量在干预前基线、干预后2个月和14个月随访时进行。主要结局指标为PA、通过加速度计测量和自我报告的MVPA，以及SB、久坐时间和久坐时间的中断情况（加速度计测量）。关键次要结局指标包括测量的身体成分、自我报告的幸福感和心理变量。过程变量包括PA的心理社会决定因素（如自主动机）的测量以及行为改变技术的使用。过程评估还包括定性访谈。监测干预的保真度。
该研究将确定“动起来”干预措施是否能有效增加职业学校学生的PA并减少SB，并确定解释结果的关键过程。
ISRCTN10979479。注册时间：2015年12月31日。
