蹲下
运动学
阻力训练
台式压力机
常量(计算机编程)
数学
流离失所(心理学)
物理医学与康复
物理疗法
物理
心理学
医学
计算机科学
经典力学
心理治疗师
程序设计语言
作者
Atle Hole Sæterbakken,Vidar Andersen,Roland van den Tillaar
出处
期刊:Journal of Strength and Conditioning Research
[Ovid Technologies (Wolters Kluwer)]
日期:2016-04-01
卷期号:30 (4): 945-952
被引量:58
标识
DOI:10.1519/jsc.0000000000001178
摘要
Saeterbakken, AH, Andersen, V, and van den Tillaar, R. Comparison of kinematics and muscle activation in free-weight back squat with and without elastic bands. J Strength Cond Res 30(4): 945–952, 2016—The purpose of the study was to compare kinematic muscle activation when performing 6 repetition maximum (6RM) squats using constant (free weights) or variable resistance (free weights + elastic bands). Twenty recreationally trained women were recruited with 4.6 ± 2.1 years of resistance training experience and a relative strength (6RM/body mass) of 1.1. After a familiarization session identifying the 6RM loads, the participants performed 6RM squats using constant and variable resistance in a randomized order. The total resistance in the variable resistance group was similar to the constant resistance in the presticking region (98%), but greater in the sticking region (105%) and the poststicking region (113%). In addition, the presticking barbell velocity was 21.0% greater using variable than constant resistance, but 22.8% lower in the poststicking region. No significant differences in muscle electromyographic activity, time occurrence, and vertical displacement between the squat modalities were observed, except for higher barbell displacement poststicking using variable resistance. It was concluded that, due to differences in total resistance in the different regions performing variable compared with constant resistance, greater barbell velocity was observed in the presticking region and lower resistance was observed in the poststicking region. However, the extra resistance in the sticking and poststicking regions during the variable resistance modality did not cause increased muscle activity. When performing squats with heavy resistance, the authors recommend using variable resistance, but we suggest increasing the percentage resistance from the elastic bands or using chains.
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