Division of Sports Science, College of Natural Science, WonKwang University, Iksan-si, Jeollabuk-do, South Korea.
J Neuroeng Rehabil. 2013 Jul 31;10:84. doi: 10.1186/1743-0003-10-84.
Most studies in performing slips and falls research reported their results after the ipsilateral leg of subjects (either right foot or left foot) was guided to contact the contaminated floor surface although many studies indicated concerns for asymmetries of legs in kinematic or kinetic variables. Thus, the present study evaluated if dominant leg's slip tendency would be different from non-dominant leg's slip tendency by comparing the Required Coefficient of Friction (RCOF) of the two lower limbs.
Forty seven health adults participated in the present study. RCOF was measured when left or right foot of subjects contacted the force platforms respectively. Paired t-test was performed to test if RCOF and heel velocity (HCV) of dominant legs was different from that of non-dominant legs. It was suggested that the asymmetry in RCOFs and HCV between the two lower limbs existed. The RCOFs of non-dominant legs were higher than that of dominant legs.
The results indicated that asymmetry in slip propensity, RCOF, was existed in lower extremity. The results from the study suggested that it would be benefit to include a variable, such as asymmetry, in slips and falls research.
尽管许多研究表明在运动学或动力学变量中对腿部的不对称性存在关注，但大多数进行滑倒和跌倒研究的研究报告都是在将研究对象的（右脚或左脚）同侧腿引导至接触污染的地面后，报告其结果。因此，本研究通过比较两条下肢的所需摩擦系数（RCOF），来评估主导腿的滑倒倾向是否与非主导腿的滑倒倾向不同。
47 名健康成年人参加了本研究。当研究对象的左脚或右脚分别接触力台时，测量 RCOF。采用配对 t 检验来检验主导腿的 RCOF 和足跟速度（HCV）是否与非主导腿的不同。结果表明，两条下肢之间的 RCOF 和 HCV 存在不对称性。非主导腿的 RCOF 高于主导腿。
结果表明，下肢存在滑倒倾向的不对称性，即 RCOF 不对称。该研究结果表明，在滑倒和跌倒研究中包含变量（如不对称性）将是有益的。
