School of Science and Health, University of Western Sydney Locked Bag 1797, Penrith 2751, Australia.
Prev Med. 2013 Feb;56(2):152-61. doi: 10.1016/j.ypmed.2012.12.004. Epub 2012 Dec 14.
Physical education (PE) that allows students to engage in moderate-to-vigorous physical activity (MVPA) can play an important role in health promotion. Unfortunately, MVPA levels in PE lessons are often very low. In this review, we aimed to determine the effectiveness of interventions designed to increase the proportion of PE lesson time that students spend in MVPA.
In March 2012, we searched electronic databases for intervention studies that were conducted in primary or secondary schools and measured the proportion of lesson time students spent in MVPA. We assessed risk of bias, extracted data, and conducted meta-analyses to determine intervention effectiveness.
From an initial pool of 12,124 non-duplicate records, 14 studies met the inclusion criteria. Students in intervention conditions spent 24% more lesson time in MVPA compared with students in usual practice conditions (standardized mean difference=0.62).
Given the small number of studies, moderate-to-high risk of bias, and the heterogeneity of results, caution is warranted regarding the strength of available evidence. However, this review indicates that interventions can increase the proportion of time students spend in MVPA during PE lessons. As most children and adolescents participate in PE, these interventions could lead to substantial public health benefits.
让学生进行适度到剧烈的身体活动（MVPA）的体育课可以在促进健康方面发挥重要作用。不幸的是，体育课中的 MVPA 水平通常非常低。在本次综述中，我们旨在确定旨在增加学生在 MVPA 中度过的体育课时间比例的干预措施的有效性。
2012 年 3 月，我们在电子数据库中搜索了在小学或中学进行的干预研究，并测量了学生在 MVPA 中度过的课时比例。我们评估了偏倚风险，提取了数据，并进行了荟萃分析以确定干预效果。
从最初的 12124 个非重复记录中，有 14 项研究符合纳入标准。与常规实践条件下的学生相比，干预条件下的学生在体育课上花费的 MVPA 时间多 24%（标准化均数差=0.62）。
鉴于研究数量较少、偏倚风险较高以及结果存在异质性，对于现有证据的强度需要谨慎。然而，本次综述表明，干预措施可以增加学生在体育课上进行 MVPA 的时间比例。由于大多数儿童和青少年都参加体育课，这些干预措施可能会带来重大的公共卫生效益。
