School of Medical and Health Sciences, Edith Cowan University, Perth, Australia.
High Performance Unit, Hockey Australia, Perth, Australia.
J Strength Cond Res. 2019 Jul;33 Suppl 1:S36-S44. doi: 10.1519/JSC.0000000000003055.
Appleby, BB, Newton, RU, and Cormack, SJ. Kinetics and kinematics of the squat and step-up in well-trained rugby players. J Strength Cond Res 33(7S): S36-S44, 2019-The purpose of this study was to compare and contrast the kinetics and kinematics of squat and step-up performance in well-trained athletes. Triaxial ground reaction force (GRF) and 3D kinematic data were collected in 4 maximal effort repetitions each at 70, 80, and 90% of 1 repetition maximum (1RM) of squat and step-up. The difference in concentric phase kinetics and kinematics between the squat and step-up was compared using effect sizes (ES ± 90% confidence limits [CLs]) classified as: less than 0.2 as trivial; 0.2-0.6 as small; 0.6-1.2 as moderate; and 1.2-2.0 as large. Where the 90% CL crossed negative and positive 0.2 values, the effect was considered "unclear.n Ground reaction force was higher for the step-up than squat at all relative intensities per leg (peak GRF ES: 2.56 ± 0.19 to 2.70 ± 0.37; average GRF ES: 1.45 ± 0.27 to 1.48 ± 0.29). Per leg, the difference in concentric impulse favored the step-up compared with squat at 70% 1RM (ES = 0.71 ± 0.40) and 80% 1RM (ES = 0.30 ± 0.41) but was unclear at 90% 1RM (ES = -0.25 ± 0.47). The squat peak velocity was greater compared with step-up at all intensities (ES = -1.74 ± 0.48 to -1.33 ± 0.48). Despite a lower external load and a single base of support, per leg, the step-up produced comparable GRF because the squat suggesting overload provided by the step-up is sufficient for maximal strength development. Future research may investigate the efficacy of the step-up in a training intervention for the development of lower-body strength.
苹果比，BB，牛顿，RU 和 Cormack，SJ。在训练有素的橄榄球运动员中，深蹲和单腿台阶蹲的动力学和运动学。J 力量与调节研究 33（7S）：S36-S44，2019-本研究的目的是比较和对比在训练有素的运动员中深蹲和单腿台阶蹲的动力学和运动学。在 70%、80%和 90%的 1 次最大重复（1RM）深蹲和单腿台阶蹲的 4 次最大努力重复中，收集了三轴地面反作用力（GRF）和 3D 运动学数据。使用效果大小（ES ± 90%置信区间[CL]）比较了深蹲和单腿台阶蹲的向心阶段动力学和运动学差异，分类为：小于 0.2 为微不足道；0.2-0.6 为小；0.6-1.2 为中；1.2-2.0 为大。当 90%CL 穿过负和正 0.2 值时，效果被认为“不清楚”。n 每条腿的地面反作用力在所有相对强度下均高于台阶蹲（峰值 GRF ES：2.56 ± 0.19 至 2.70 ± 0.37；平均 GRF ES：1.45 ± 0.27 至 1.48 ± 0.29）。每条腿，与深蹲相比，在 70%1RM（ES = 0.71 ± 0.40）和 80%1RM（ES = 0.30 ± 0.41）时，向心冲量的差异有利于台阶蹲，但在 90%1RM 时不清楚（ES = -0.25 ± 0.47）。在所有强度下，深蹲的峰值速度都大于台阶蹲（ES = -1.74 ± 0.48 至 -1.33 ± 0.48）。尽管台阶蹲的外部负荷和支撑基础较少，但每条腿的台阶蹲产生的 GRF 与深蹲相当，这表明台阶蹲提供的超负荷足以促进最大力量发展。未来的研究可能会调查台阶蹲在下肢力量发展的训练干预中的效果。
