O'Connor Kristian M, Hamill Joseph
Biomechanics Laboratory, University of Massachusetts, Amherst, MA 01003, USA.
Clin Biomech (Bristol). 2004 Jan;19(1):71-7. doi: 10.1016/j.clinbiomech.2003.09.001.
To determine the kinematic, kinetic and EMG responses to perturbations of the foot by running in varus, neutral, and valgus-wedged shoes.
Within-subjects study comparing kinematics, kinetics and EMG while running in three different shoe conditions.
Excessive pronation has been cited as a key contributor to many types of running injuries. However, the roles of the extrinsic foot muscles (those that control motion of the foot) during the stance phase of running have not been adequately identified, which is critical to determining the relationship between pronation and injury.
Ten males ran in varus, valgus, and neutral-wedged shoes while three-dimensional kinematic and kinetic data and EMG data were collected. Surface EMG data were collected from the tibialis anterior, peroneus longus, medial and lateral gastrocnemius, and soleus. Indwelling EMG was obtained from the tibialis posterior. The net joint moment, power, and total positive and negative work was calculated in the frontal plane. EMG onset, offset, and integrated values were reported.
The maximum eversion angle, maximum inversion moment and total negative work done in the frontal plane were greatest while running in the valgus shoe and least in the varus shoe. The greater joint moment was not accompanied by changes in muscle activation patterns, although the tibialis posterior data were inconclusive in this respect.
Greater pronation leads to greater energy absorption in the foot invertor muscles and tendons. While not conclusive, the EMG data suggest that for these muscles there was not a neuromuscular adaptation to the perturbation.
确定在穿着内翻、中立和外翻楔形鞋跑步时，足部受到扰动后的运动学、动力学和肌电图反应。
受试者内研究，比较在三种不同鞋子条件下跑步时的运动学、动力学和肌电图。
过度旋前被认为是多种跑步损伤的关键因素。然而，在跑步支撑阶段，足部外在肌肉（控制足部运动的肌肉）的作用尚未得到充分明确，这对于确定旋前与损伤之间的关系至关重要。
10名男性分别穿着内翻、外翻和中立楔形鞋跑步，同时收集三维运动学和动力学数据以及肌电图数据。从胫骨前肌、腓骨长肌、腓肠肌内侧头和外侧头以及比目鱼肌收集表面肌电图数据。从胫后肌获取植入式肌电图。计算额面内的净关节力矩、功率以及总的正负功。报告肌电图的起始、结束和积分值。
在穿着外翻鞋跑步时，额面内的最大外翻角度、最大内翻力矩和总的负功最大，而在穿着内翻鞋跑步时最小。尽管胫后肌的数据在这方面尚无定论，但更大的关节力矩并未伴随着肌肉激活模式的改变。
更大程度的旋前会导致足部内翻肌和肌腱吸收更多能量。虽然尚无定论，但肌电图数据表明，对于这些肌肉而言，并未出现对扰动的神经肌肉适应。
