Andersen Vidar, Steiro Fimland Marius, Knutson Kolnes Maria, Jensen Susanne, Laume Martine, Hole Saeterbakken Atle
1Faculty of Tacher Education and Sport, Sogn and Fjordane University College, Sogndal, Norway; 2Department of Public Health and General Practice, Faculty of Medicine, Norwegian University of Science and Technology, Trondheim, Norway; and 3Hysnes Rehabilitation Center, St. Olavs University Hospital, Trondheim, Norway.
J Strength Cond Res. 2016 Dec;30(12):3456-3463. doi: 10.1519/JSC.0000000000001451.
Andersen, V, Fimland, MS, Kolnes, MK, Jensen, S, Laume, M and Saeterbakken, AH. Electromyographic comparison of squats using constant or variable resistance. J Strength Cond Res 30(12): 3456-3463, 2016-The aim of the study was to compare the electromyographic (EMG) activity of vastus lateralis, vastus medialis, rectus femoris, and biceps femoris when performing the squat with constant resistance or variable resistance with 2 or 4 elastic bands, respectively, contributing with a mean of 39 and 73% of the total loads. Nineteen resistance-trained women performed 6 repetition maximum using 3 different experimental conditions: free weights (FW), free weights + 2 elastic bands (FW + 2EB), and free weights + 4 elastic bands (FW + 4EB). During analyses, each repetition was divided into 6 phases: upper (more extended knee), middle, and lower phase of the descending and ascending movements. Increased activation in the upper parts of the movement was observed for both variable resistance conditions compared with constant resistance (9-51%, p < 0.001-0.050). Further, a dose-response effect of variable resistance was observed in the upper ascending movement, with 4 elastic bands increasing muscle activation more than 2 elastic bands (7-28%, p = 0.003-0.007). For the whole movement, a 12% higher activation of the biceps femoris was observed for FW + 4EB compared with FW (p = 0.005). There were no differences between the other conditions in any of the muscles (p = 0.077-1.000). In conclusion, performing the squat using free weights in combination with elastic bands seems to be preferable compared with free weights alone and more so with a high contribution from variable resistance to the total load.
安德森，V，菲姆兰德，MS，科尔内斯，MK，詹森，S，劳梅，M和塞特巴克肯，AH。使用恒定或可变阻力进行深蹲的肌电图比较。《力量与体能研究杂志》30(12): 3456 - 3463，2016年——本研究的目的是比较分别使用恒定阻力或可变阻力（2条或4条弹力带，分别平均贡献总负荷的39%和73%）进行深蹲时，股外侧肌、股内侧肌、股直肌和股二头肌的肌电图（EMG）活动。19名有阻力训练经验的女性在3种不同实验条件下进行6次最大重复量训练：自由重量（FW）、自由重量 + 2条弹力带（FW + 2EB）和自由重量 + 4条弹力带（FW + 4EB）。在分析过程中，每次重复分为6个阶段：下降和上升运动的上（膝关节更伸展）、中、下阶段。与恒定阻力相比，两种可变阻力条件下在运动上部均观察到激活增加（9 - 51%，p < 0.001 - 0.050）。此外，在上升运动上部观察到可变阻力的剂量反应效应，4条弹力带比2条弹力带增加的肌肉激活更多（7 - 28%，p = 0.003 - 0.007）。对于整个运动，与FW相比，FW + 4EB时股二头肌的激活高12%（p = 0.005）。其他条件下任何肌肉之间均无差异（p = 0.077 - 1.000）。总之，与单独使用自由重量相比，自由重量结合弹力带进行深蹲似乎更可取，并且当可变阻力对总负荷贡献较高时更是如此。
