Ha Amy S, Lonsdale Chris, Ng Johan Y Y, Lubans David R
Department of Sports Science and Physical Education, The Chinese University of Hong Kong, Shatin, Hong Kong.
BMC Public Health. 2014 May 30;14:535. doi: 10.1186/1471-2458-14-535.
Schools present venues for physical activity promotion among youth, with physical education (PE) considered the primary vehicle responsible for increasing activity levels. Yet students are not very physically active during typical school PE classes. With the aim to engage Hong Kong students in more moderate-to-vigorous physical activity (MVPA) during PE, a fitness infusion intervention using rope skipping was designed, and its effectiveness will be examined. Rope skipping was chosen because a) it provides moderate-to-high intensity physical activity; b) is inexpensive; c) students find it enjoyable; and d) is feasible in typical environments in Hong Kong, where PE classes are large in size (up to 40 students) and space available for physical activity is usually limited.
METHODS/DESIGN: A matched-pair cluster randomized controlled trial was designed. Secondary school students from 24 classes (from 12 schools) will be recruited to participate in the trial. Students' baseline MVPA will be measured during school PE. Classes will be matched according to baseline variables and one class from each pair will be randomized into the experimental group. Teachers in the experimental group will be invited to attend a teacher workshop, and will insert a 15-minute rope skipping activity in four consecutive PE lessons. Motivational factors based on self-determination theory will also be measured as secondary outcomes. The effectiveness of the intervention will be evaluated by comparing changes in the proportion of lesson time spent in MVPA from baseline to follow-up across the experimental and control groups.
Physical activity levels in PE are often very low and there is a need to identify feasible low-cost interventions that can be easily disseminated. If the results of the study suggest the intervention to be effective, it could be implemented to schools throughout Hong Kong and other cities where space is limited.
ACTRN12613000968774. Registered on 30 August 2013.
学校是促进青少年体育活动的场所，体育教育（PE）被认为是提高活动水平的主要手段。然而，在典型的学校体育课上，学生们的身体活动并不多。为了让香港学生在体育课上进行更多的中度至剧烈身体活动（MVPA），设计了一项使用跳绳的健身融入干预措施，并将检验其效果。选择跳绳是因为：a）它能提供中高强度的身体活动；b）成本低廉；c）学生们觉得有趣；d）在香港的典型环境中可行，香港的体育课规模较大（多达40名学生），可供体育活动的空间通常有限。
方法/设计：设计了一项配对整群随机对照试验。将招募来自24个班级（12所学校）的中学生参与试验。将在学校体育课期间测量学生的基线MVPA。班级将根据基线变量进行配对，每对中的一个班级将被随机分配到实验组。将邀请实验组的教师参加教师工作坊，并在连续四节体育课中插入15分钟的跳绳活动。基于自我决定理论的动机因素也将作为次要结果进行测量。将通过比较实验组和对照组从基线到随访期间MVPA所占用课程时间比例的变化来评估干预措施的效果。
体育课上的身体活动水平通常很低，需要确定可行的低成本干预措施，以便能够轻松推广。如果研究结果表明该干预措施有效，那么它可以在香港及其他空间有限的城市的学校中实施。
澳大利亚和新西兰临床试验注册中心（ANZCTR）：ACTRN12613000968774。于2013年8月30日注册。
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