Musculoskeletal Health and Movement Science Laboratory, University of Toledo, OH. Dr Pfile is now at College of Charleston, SC.
J Athl Train. 2013 Sep-Oct;48(5):685-95. doi: 10.4085/1062-6050-48.3.02. Epub 2013 Mar 19.
Excessive ground reaction force when landing from a jump may result in lower extremity injuries. It is important to better understand how feedback can influence ground reaction force (GRF) and potentially reduce injury risk.
To determine the effect of expert-provided (EP), self-analysis (SA), and combination EP and SA (combo) feedback on reducing peak vertical GRF during a jump-landing task.
We searched the Web of Science database on July 1, 2011; using the search terms ground reaction force, landing biomechanics, and feedback elicited 731 initial hits.
Of the 731 initial hits, our final analysis included 7 studies that incorporated 32 separate data comparisons.
Standardized effect sizes and 95% confidence intervals (CIs) were calculated between pretest and posttest scores for each feedback condition.
We found a homogeneous beneficial effect for combo feedback, indicating a reduction in GRF with no CIs crossing zero. We also found a homogeneous beneficial effect for EP feedback, but the CIs from 4 of the 10 data comparisons crossed zero. The SA feedback showed strong, definitive effects when the intervention included a videotape SA, with no CIs crossing zero.
Of the 7 studies reviewed, combo feedback seemed to produce the greatest decrease in peak vertical GRF during a jump-landing task.
从跳跃中落地时过大的地面反作用力可能会导致下肢受伤。更好地了解反馈如何影响地面反作用力（GRF）并降低受伤风险是很重要的。
确定专家提供的（EP）、自我分析（SA）和 EP 和 SA 组合（组合）反馈对降低跳跃着陆任务中峰值垂直 GRF 的影响。
我们于 2011 年 7 月 1 日在 Web of Science 数据库中进行了搜索；使用“地面反作用力、着陆生物力学和反馈”这几个搜索词得到了 731 个初始结果。
在这 731 个初始结果中，我们的最终分析包括了 7 项研究，其中包含了 32 个单独的数据比较。
为每个反馈条件计算了预测试和后测试分数之间的标准化效应大小和 95%置信区间（CI）。
我们发现组合反馈具有均匀的有益效果，表明 GRF 降低且没有 CI 穿过零。我们还发现 EP 反馈具有均匀的有益效果，但 10 个数据比较中的 4 个 CI 穿过了零。当干预措施包括视频 SA 时，SA 反馈表现出强烈、明确的效果，没有 CI 穿过零。
在综述的 7 项研究中，组合反馈似乎在跳跃着陆任务中产生了最大的峰值垂直 GRF 降低。
