Jago Russell, Sebire Simon J, Davies Ben, Wood Lesley, Edwards Mark J, Banfield Kathryn, Fox Kenneth R, Thompson Janice L, Powell Jane E, Montgomery Alan A
Centre for Exercise, Nutrition & Health Sciences, School for Policy Studies, University of Bristol, Bristol, UK.
Int J Behav Nutr Phys Act. 2014 Sep 11;11:114. doi: 10.1186/s12966-014-0114-z.
Extracurricular programmes could provide a mechanism to increase the physical activity (PA) of primary-school-aged children. The aim of this feasibility study was to examine whether the Action 3:30 intervention, which is delivered by teaching assistants, holds promise as a means of increasing the PA of Year 5 and 6 children.
A cluster randomised feasibility trial was conducted in 20 primary schools. Ten schools received the Action 3:30 intervention and 10 schools were allocated to the control arm. The intervention was 40 one-hour sessions, delivered twice a week by teaching assistants. The proportion of participants recruited per school was calculated. Session delivery and session attendance was calculated for intervention schools. Weekday and after-school (3.30 to 8.30 pm) moderate to vigorous intensity physical (MVPA) was assessed by accelerometer at baseline (T0), during the last few weeks of the intervention (T1) and four months after the intervention had ended (T2). The costs of delivering the intervention were estimated.
Five intervention schools ran all 40 of the intended sessions. Of the remaining five, three ran 39, one ran 38 and one ran 29 sessions. Mean attendance was 53%. The adjusted difference in weekday MVPA at T1 was 4.3 minutes (95% CI -2.6 to 11.3). Sex-stratified analyses indicated that boys obtained 8.6 more minutes of weekday MVPA than the control group (95% CI 2.8 to 14.5) at T1 with no effect for girls (0.15 minutes, 95% CI -9.7 to 10.0). There was no evidence that participation in the programme increased MVPA once the club sessions ceased (T2). The indicative average cost of this intervention was £2,425 per school or £81 per participating child during its first year and £1,461 per school or £49 per participating child thereafter.
The effect of the Action 3:30 intervention was comparable to previous physical activity interventions but further analysis indicated that there was a marked sex difference with a positive impact on boys and no evidence of an effect on girls. The Action 3:30 intervention holds considerable promise but more work is needed to enhance the effectiveness of the intervention, particularly for girls.
ISRCTN58502739.
课外项目可为增加小学适龄儿童的身体活动提供一种机制。这项可行性研究的目的是检验由教学助理实施的“3:30行动”干预措施，是否有望成为增加五年级和六年级儿童身体活动的一种方式。
在20所小学进行了一项整群随机可行性试验。10所学校接受“3:30行动”干预，10所学校被分配到对照组。干预措施为40节时长一小时的课程，由教学助理每周授课两次。计算每所学校招募的参与者比例。计算干预学校的课程授课情况和出勤情况。在基线期（T0）、干预的最后几周（T1）以及干预结束四个月后（T2），通过加速度计评估工作日和放学后（下午3:30至晚上8:30）的中度至剧烈身体活动（MVPA）。估算实施干预措施的成本。
五所干预学校完成了所有40节计划课程。其余五所学校中，三所完成了39节，一所完成了38节，一所完成了29节。平均出勤率为53%。T1时工作日MVPA的调整差异为4.3分钟（95%置信区间-2.6至11.3）。按性别分层分析表明，T1时男孩的工作日MVPA比对照组多8.6分钟（95%置信区间2.8至14.5），而女孩无影响（0.15分钟，95%置信区间-9.7至10.0）。没有证据表明一旦俱乐部课程结束（T2），参与该项目会增加MVPA。这项干预措施的指示性平均成本在第一年为每所学校2425英镑或每名参与儿童81英镑，此后为每所学校1461英镑或每名参与儿童49英镑。
“3:30行动”干预措施的效果与之前的身体活动干预措施相当，但进一步分析表明存在明显的性别差异，对男孩有积极影响，对女孩没有影响的证据。“3:30行动”干预措施很有前景，但需要做更多工作来提高干预措施的有效性，特别是对女孩。
ISRCTN58502739
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