A Comparison of Tibiofemoral Joint Forces and Electromyographic Activit During Open and Closed Kinetic Chain Exercises
A Comparison of Tibiofemoral Joint Forces and Electromyographic Activit During Open and Closed Kinetic Chain Exercises
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开放式和封闭式运动链运动中胫股关节力和肌电活动的比较
DOI：
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发表时间：
1996
影响因子：
4.8
通讯作者：
Melissa L. Boyd
中科院分区：
文献类型：
--
作者：
K. Wilk;R. Escamilla;G. Fleisig;S. Barrentine;J. Andrews;Melissa L. Boyd
我们选择研究胫股关节动力学(压缩力、前后剪切力和伸展扭矩)以及股四头肌、腿筋和腓肠肌在开放动力链伸膝和闭合动力链腿压下蹲时的肌电活动。10名未受伤的男性受试者进行了4次等张重复，每次重复的最大重量为12次。使用肌电图学、运动学和运动学数据计算股内力。下蹲时最大压力值为6139±1708 N，发生在屈膝91°时，伸膝运动时最大压力值为4598±2546 N(屈膝90°时)。在闭合运动链训练中，后剪切力(后交叉韧带应力)出现在整个运动范围内，峰值出现在膝关节屈曲85°~105°之间。前十字韧带切变力(前十字韧带应力)在膝关节伸展40°至完全伸展时出现，在屈膝14°时最大，为248±259 N。肌电数据显示，与其他两种练习相比，深蹲时腿筋和股四头肌的协同收缩程度更大。在腿部挤压时，股四头肌的肌电活动约为最大速度等长收缩的39%~52%，而腿绳肌最小(最大速度等长收缩的12%)。本研究结果表明，两种运动链闭合训练的胫股力量和肌肉活动能力有显著差异，而开放运动链训练和闭合运动链训练的胫股力量和肌肉活动度也有显著差异。
We chose to investigate tibiofemoral joint kinetics (compressive force, anteroposterior shear force, and extension torque) and electromyographic activity of the quadriceps, hamstring, and gastrocnemius muscles during open kinetic chain knee extension and closed kinetic chain leg press and squat. Ten uninjured male subjects performed 4 isotonic repetitions with a 12 repetition maximal weight for each exercise. Tib iofemoral forces were calculated using electromyo graphic, kinematic, and kinetic data. During the squat, the maximal compressive force was 6139 ± 1708 N, occurring at 91° of knee flexion; whereas the maximal compressive force for the knee extension exercise was 4598 ± 2546 N (at 90° knee flexion). During the closed kinetic chain exercises, a posterior shear force (poste rior cruciate ligament stress) occurred throughout the range of motion, with the peak occurring from 85° to 105° of knee flexion. An anterior shear force (anterior cruciate ligament stress) was noted during open kinetic chain knee extension from 40° to full extension; a peak force of 248 ± 259 N was noted at 14° of knee flexion. Electromyographic data indicated greater hamstring and quadriceps muscle co-contraction during the squat compared with the other two exercises. During the leg press, the quadriceps muscle electromyographic activ ity was approximately 39% to 52% of maximal velocity isometric contraction; whereas hamstring muscle ac tivity was minimal (12% maximal velocity isometric contraction). This study demonstrated significant differ ences in tibiofemoral forces and muscle activity be tween the two closed kinetic chain exercises, and be tween the open and closed kinetic chain exercises.
关于我们的前十字韧带数据的解释。
影响因子：
4.2
作者：
Butler,DL;Grood,ES;Noyes,FR;Sodd,AN
通讯作者：
Sodd,AN
DOI：
10.2106/00004623-198466030-00005
发表时间：
1984-01-01
影响因子：
5.3
作者：
NOYES, FR;BUTLER, DL;HEFZY, MS
通讯作者：
HEFZY, MS
DOI：
10.1097/00003086-198310000-00042
发表时间：
1983-01-01
影响因子：
4.2
作者：
WICKIEWICZ, TL;ROY, RR;EDGERTON, VR
通讯作者：
EDGERTON, VR