不同技术进行腿举运动时股四头肌的肌电活动
Myoeletric Activity of the Quadriceps During Leg Press Exercise Performed With Differing Techniques.
作者信息
Machado Wallace, Paz Gabriel, Mendes Leonardo, Maia Marianna, Winchester Jason B, Lima Vicente, Willardson Jeffrey M, Miranda Humberto
机构信息
1School of Physical Education and Sports, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil;2Lato Sensu Postgraduate Program in Strength Training, School of Physical Education and Sports, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil;3Laboratory of Biodynamic of Exercise, Health and Performance, Castelo Branco University, Rio de Janeiro, Brazil;4School of Physical Therapy, University of the Incarnate Word, San Antonio, Texas; and5Department of Health and Human Performance, Rocky Mountain College, Billings, Montana.
出版信息
J Strength Cond Res. 2017 Feb;31(2):422-429. doi: 10.1519/JSC.0000000000001494.
Machado, W, Paz, G, Mendes, L, Maia, M, Winchester, JB, Lima, V, Willardson, JM, and Miranda, H. Myoeletric activity of the quadriceps during leg press exercise performed with differing techniques. J Strength Cond Res 31(2): 422-429, 2017-The quadriceps muscle supplies the motive force for dynamic knee extension. During this action, the vastus medialis oblique (VMO) and vastus lateralis (VL) co-contract to stabilize the patella as it tracks within the patellofemoral groove. The purpose of this study was to analyze surface electromyographic (SEMG) responses for the VL, VMO, rectus femoris (RF), and biceps femoris (BF), as well as the VMO:VL ratio during an open-kinetic chain 45° angled leg press (LP45). The traditional LP45 technique was compared with 2 alternative LP45 exercise techniques that used a physioball and elastic band, respectively. Thirteen female college students performed 3 protocols in random order: TRAD-1 LP45 set performed using the traditional exercise technique, PBALL-1 LP45 set performed with a physioball held between the knee joints, and PEB-1 LP45 set performed with an elastic band proximal to the knee joints. Ten repetitions at 70% of a 10 repetition maximum load were performed in each protocol, and the SEMG data were recorded for the VMO, VL, RF, and BF muscles. Significant increases in VMO activity were noted during PBALL vs. PEB (p = 0.001) and TRAD (p = 0.002). Higher VMO activity was noted during TRAD vs. PEB (p = 0.001). Greater VL activity was noted during PBALL vs. TRAD (p = 0.0001) and PEB (p = 0.0001). The PBALL condition elicited a greater VMO:VL ratio during the concentric phase vs. the PEB (p = 0.001) and TRAD (p = 0.001) protocols. Greater RF activity was observed during PEB vs. TRAD (p = 0.001) and PBALL (p = 0.001). Therefore, practitioners should consider placing a physioball between the knees during the LP45 exercise as an alternative technique when greater overall quadriceps activity is desired for clinical rehabilitation or a muscle strengthening program.
马查多、W、帕兹、G、门德斯、L、马亚、M、温彻斯特、JB、利马、V、威拉德森、JM和米兰达、H。不同技术进行腿举练习时股四头肌的肌电活动。《力量与体能研究杂志》31(2):422 - 429，2017年 - 股四头肌为动态伸膝提供动力。在此动作过程中，股内侧斜肌（VMO）和股外侧肌（VL）共同收缩，以在髌骨在髌股关节沟内移动时稳定髌骨。本研究的目的是分析在开链45°角腿举（LP45）过程中股外侧肌、股内侧斜肌、股直肌（RF）和股二头肌（BF）的表面肌电图（SEMG）反应，以及VMO:VL比值。将传统的LP45技术与分别使用健身球和弹力带的两种替代LP45练习技术进行比较。13名女大学生随机顺序进行3种方案：使用传统练习技术进行TRAD - 1组LP45练习，在膝关节之间夹着健身球进行PBALL - 1组LP45练习，在膝关节近端使用弹力带进行PEB - 1组LP45练习。每个方案均以10次重复最大负荷的70%进行10次重复，并记录VMO、VL、RF和BF肌肉的SEMG数据。与PEB（p = 0.001）和TRAD（p = 0.002）相比，PBALL期间VMO活动显著增加。与PEB相比，TRAD期间VMO活动更高（p = 0.001）。与TRAD（p = 0.0001）和PEB（p = 0.0001）相比，PBALL期间VL活动更大。与PEB（p = 0.001）和TRAD（p = 0.001）方案相比，PBALL条件在向心阶段引发更高的VMO:VL比值。与TRAD（p = 0.001）和PBALL（p = 0.001）相比，PEB期间观察到RF活动更大。因此，当临床康复或肌肉强化计划需要更大的股四头肌整体活动时，从业者应考虑在LP45练习期间在膝关节之间放置一个健身球作为替代技术。
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