Niu Wenxin, Feng Tienan, Jiang Chenghua, Zhang Ming
Tongji Hospital, Tongji University School of Medicine, Shanghai 200455, China ; Interdisciplinary Division of Biomedical Engineering, The Hong Kong Polytechnic University, Hong Kong ; Shanghai Key Laboratory of Orthopaedic Implants, Shanghai 200011, China.
Department of Disaster and Emergency Medicine, Eastern Hospital, Tongji University School of Medicine, Shanghai 200120, China.
Biomed Res Int. 2014;2014:126860. doi: 10.1155/2014/126860. Epub 2014 Aug 26.
(1) To systematically review peak vertical ground reaction force (PvGRF) during two-leg drop landing from specific drop height (DH), (2) to construct a mathematical model describing correlations between PvGRF and DH, and (3) to analyze the effects of some factors on the pooled PvGRF regardless of DH.
A computerized bibliographical search was conducted to extract PvGRF data on a single foot when participants landed with both feet from various DHs. An innovative mathematical model was constructed to analyze effects of gender, landing type, shoes, ankle stabilizers, surface stiffness and sample frequency on PvGRF based on the pooled data.
Pooled PvGRF and DH data of 26 articles showed that the square root function fits their relationship well. An experimental validation was also done on the regression equation for the medicum frequency. The PvGRF was not significantly affected by surface stiffness, but was significantly higher in men than women, the platform than suspended landing, the barefoot than shod condition, and ankle stabilizer than control condition, and higher than lower frequencies.
The PvGRF and root DH showed a linear relationship. The mathematical modeling method with systematic review is helpful to analyze the influence factors during landing movement without considering DH.
(1)系统回顾从特定跌落高度(DH)进行双腿下落着地时的峰值垂直地面反作用力(PvGRF);(2)构建描述PvGRF与DH之间相关性的数学模型;(3)分析一些因素对不考虑DH情况下的合并PvGRF的影响。
进行计算机文献检索,以提取参与者从不同DH双脚着地时单脚的PvGRF数据。基于汇总数据构建一个创新的数学模型,以分析性别、着地类型、鞋子、脚踝稳定器、表面刚度和采样频率对PvGRF的影响。
26篇文章的汇总PvGRF和DH数据表明,平方根函数能很好地拟合它们之间的关系。还对中频回归方程进行了实验验证。PvGRF不受表面刚度的显著影响,但男性显著高于女性,平台着地高于悬吊着地,赤脚高于穿鞋情况,佩戴脚踝稳定器高于对照情况,且高于低频。
PvGRF与根号DH呈线性关系。采用系统回顾的数学建模方法有助于在不考虑DH的情况下分析着地运动中的影响因素。