Chang Jong Sung, Kwon Yong Hyun, Kim Chung Sun, Ahn Sang-Ho, Park So Hyun
Department of Physical Therapy, Daegu Haany University, Daegu, Korea.
J Back Musculoskelet Rehabil. 2012;25(1):21-6. doi: 10.3233/BMR-2012-0306.
The study compared lower extremity kinematics and kinetics between male subjects with flat and normal feet when landing on both feet from platforms at different heights. Ten subjects with a flat feet arch and 10 subjects with a normal foot arch were recruited. They performed a double limb drop landing from 20, 40, and 60 cm onto a force-plate. A three-dimensional motion analysis system, force plates, and electromyography were used to analyze lower extremity kinetic and kinematic data. The GRF and angle of sagittal plane significantly increased with landing height in the flat foot group. In particular, hip joint angles at a height of 60 cm were significantly greater. The electromyography values were significantly higher for the tibialis anterior and vastus lateralis muscles, but were significantly lower in the abductor hallucis, gastrocnemius, and biceps femoris muscles in the flat foot group. GRF, joint angles, and muscle activity patterns in the lower extremities increases more with height in flat footed individuals than in people with a normal foot arch. Flat feet may aggravate the risk of shock on landing from a height; this might be ameliorated by a compensatory strategy at the hip joints to facilitate load distribution.
该研究比较了扁平足男性受试者和正常足男性受试者从不同高度平台双脚落地时的下肢运动学和动力学。招募了10名扁平足弓受试者和10名正常足弓受试者。他们从20厘米、40厘米和60厘米处进行双下肢下落着地动作，落在测力板上。使用三维运动分析系统、测力板和肌电图来分析下肢动力学和运动学数据。扁平足组中，地面反作用力（GRF）和矢状面角度随着地高度显著增加。特别是在60厘米高度时，髋关节角度显著更大。扁平足组中，胫骨前肌和股外侧肌的肌电图值显著更高，但拇展肌、腓肠肌和股二头肌的肌电图值显著更低。与正常足弓的人相比，扁平足个体下肢的GRF、关节角度和肌肉活动模式随高度增加得更多。扁平足可能会增加从高处落地时的冲击风险；这可能通过髋关节的代偿策略来改善，以促进负荷分布。
