Sports Research Centre, Department of Sport Sciences, Miguel Hernández University, Elche, Spain.
Faculty of Health Sciences, University Isabel I of Castilla, Burgos, Spain; and.
J Strength Cond Res. 2024 Aug 1;38(8):1394-1400. doi: 10.1519/JSC.0000000000004818. Epub 2024 Jun 4.
Asencio, P, García-Valverde, A, Albaladejo-García, C, Beato, M, Moreno-Hernández, FJ, and Sabido, R. Analysis of concentric and eccentric power in flywheel exercises depending on the subjects' strength level and body mass. J Strength Cond Res 38(8): 1394-1400, 2024-The objective of this study is to describe how flywheel exercise mechanical outputs are affected by the athletes' body mass (BM) and strength level and by the exercise type. Forty-six recreational athletes came to a laboratory 3 times. On the first day, descriptive data, squat (1 repetition maximum: 1RM) and flywheel familiarization were performed. After a second day of familiarization, subjects performed a randomized flywheel exercise-testing protocol of squat and split squat exercises. The variables used for data analysis were peak concentric power and peak eccentric power, eccentric/concentric ratio, and their relationship with 1RM/BM. Subjects were assigned to a stronger or weaker group according to their 1RM/BM ratio. Group differences were found in absolute values of eccentric overload (EOL) ( p < 0.01; effect size [ES] = 0.51) and EOL/BM ( p < 0.01; ES = 0.46) only in the split squat. Absolute power values in the concentric phase showed differences between inertial load ( p < 0.01; ES = 0.41). The stronger group did not present significant differences between inertial loads during squat ( p < 0.01; ES = 0.46), but they showed different ratios with light inertias in comparison with the weaker group ( p < 0.01; ES = 0.46). There were significant differences between groups with light inertias in split squat (nondominant) and squat exercises ( p < 0.05; ES = 0.29) in the eccentric and concentric phases ( p < 0.116; ES = 0.20). Squat and split squat exercises present different profiles depending on the training level. In conclusion, it is recommended that practitioners perform a test to understand the inertial load-power profile (concentric, eccentric, and their ratio) for each exercise and also consider the user's strength level for selection of the inertial load and for the exercise to use in training.
阿斯森西奥、P、加西亚-巴尔德斯、A、阿尔瓦拉多-加西亚、C、贝托、M、莫雷诺-埃尔南德斯、FJ 和萨比多、R. 基于受试者力量水平和体重分析飞轮练习的向心和离心力量。J 力量与调节研究 38（8）：1394-1400，2024-本研究旨在描述飞轮运动的机械输出如何受到运动员体重（BM）和力量水平以及运动类型的影响。46 名休闲运动员三次来到实验室。在第一天，进行了描述性数据、深蹲（1 重复最大：1RM）和飞轮熟悉度的测试。在第二天的熟悉度测试后，受试者进行了随机的飞轮测试，包括深蹲和分腿蹲练习。用于数据分析的变量是峰值向心力量和峰值离心力量、离心/向心比值，以及它们与 1RM/BM 的关系。根据 1RM/BM 比值，受试者被分配到较强或较弱的组。在分腿蹲中，仅发现了偏心过载（EOL）的绝对值（p<0.01；效应量[ES] = 0.51）和 EOL/BM（p<0.01；ES = 0.46）的组间差异。在向心阶段的绝对力量值在惯性负荷之间存在差异（p<0.01；ES = 0.41）。较强组在深蹲时，惯性负荷之间没有显著差异（p<0.01；ES = 0.46），但与较弱组相比，它们在轻惯性时表现出不同的比值（p<0.01；ES = 0.46）。在分腿蹲（非优势侧）和深蹲运动的偏心和向心阶段（p<0.05；ES = 0.29）中，轻惯性时，两组之间存在显著差异（p<0.116；ES = 0.20）。深蹲和分腿蹲练习呈现出不同的训练水平。总之，建议从业者进行测试，以了解每个练习的惯性负荷-力量曲线（向心、离心及其比值），并考虑使用者的力量水平，以便选择惯性负荷和在训练中使用的练习。
