非意向性举起重物速度下降具有负荷和运动特异性。
Decline in Unintentional Lifting Velocity Is Both Load and Exercise Specific.
机构信息
Department of Exercise Science, Lindenwood University Belleville, Belleville, Illinois.
School of Health Sciences, Lindenwood University, St. Charles, Missouri; and.
出版信息
J Strength Cond Res. 2020 Oct;34(10):2709-2714. doi: 10.1519/JSC.0000000000003786.
Beck, M, Varner, W, LeVault, L, Boring, J, and Fahs, CA. Decline in unintentional lifting velocity is both load and exercise specific. J Strength Cond Res 34(10): 2709-2714, 2020-When monitoring the mean concentric velocity (MCV) for velocity-based resistance training, often a threshold in the decline in the MCV is used to regulate the number of repetitions performed. However, it is not clear if the decline in the MCV is affected by the type of exercise or the relative load used. Therefore, the purpose of this study was to compare the decline in the MCV between the overhead press (OHP) and deadlift (DL) during sets to fatigue at different loads. Thirty individuals (23 ± 3 years) with current training experience with both the OHP and DL completed a 1 repetition maximum (1RM) protocol for the OHP and DL. Subjects then returned to the laboratory on 2 separate occasions and completed 1 set of the OHP and DL to volitional fatigue at either 70 or 90% of their 1RM in a randomized order. The open barbell system measured the MCV of all repetitions. The absolute and relative (%) decline in the MCV was calculated for each condition and compared between loads (70 vs. 90% 1RM) and between lifts (OHP vs. DL). An alpha level of 0.05 was used at the criterion for statistical significance. The absolute decline in the MCV was greatest for the 70% OHP condition (0.36 ± 0.12 m·s) followed by 90% OHP (0.19 ± 0.10 m·s), 70% DL (0.16 ± 0.08 m·s), and 90% DL (0.09 ± 0.06 m·s); all were significantly different from one another (p < 0.05) except for 70% DL vs. 90% OHP (p = 0.441). There was a greater relative decline in the MCV for the OHP compared with the DL (50.1 ± 11.8% vs. 28.5 ± 11.8%; p < 0.001) and for 70% 1RM compared with 90% 1RM (44.5 ± 12.0% vs. 34.1 ± 12.0%; p < 0.001). These data suggest the decline in the MCV is both exercise and load specific. Applying a uniform velocity decline threshold for velocity-based training may reduce training volume to different extents depending on the exercise and relative load used.
贝克、瓦尔纳、勒沃、博林和法斯。非意向性举重速度的下降既与负荷有关，也与运动项目有关。《力量与调节研究杂志》34（10）：2709-2714，2020 年——在基于速度的阻力训练中监测平均向心速度（MCV）时，通常使用 MCV 下降的阈值来调节完成的重复次数。然而，目前尚不清楚 MCV 的下降是否受到运动项目类型或使用的相对负荷的影响。因此，本研究的目的是比较不同负荷下进行至力竭的卧推（OHP）和硬拉（DL）之间的 MCV 下降。30 名有 OHP 和 DL 当前训练经验的个体（23±3 岁）完成了 OHP 和 DL 的 1 次最大重复（1RM）协议。然后，受试者在 2 个不同的场合返回实验室，以随机顺序以 70%或 90%的 1RM 完成 1 组 OHP 和 DL 至力竭。开式杠铃系统测量了所有重复的 MCV。计算了每个条件下 MCV 的绝对和相对（%）下降，并比较了负荷（70%与 90%1RM）和举重（OHP 与 DL）之间的差异。统计显著性的临界值为 0.05。70%OHP 条件下 MCV 的绝对下降最大（0.36±0.12 m·s），其次是 90%OHP（0.19±0.10 m·s）、70%DL（0.16±0.08 m·s）和 90%DL（0.09±0.06 m·s）；除了 70%DL 与 90%OHP 之间（p=0.441），其他所有条件之间均有显著差异（p<0.05）。与 DL 相比，OHP 的 MCV 相对下降更大（50.1±11.8%比 28.5±11.8%；p<0.001），与 70%1RM 相比，90%1RM 的 MCV 相对下降更大（44.5±12.0%比 34.1±12.0%；p<0.001）。这些数据表明，MCV 的下降既与运动项目有关，也与负荷有关。对于基于速度的训练，应用统一的速度下降阈值可能会根据运动项目和使用的相对负荷不同，以不同程度减少训练量。
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