Department of Life and Sports Science, Medway Kent, University of Greenwich, Chatham, United Kingdom.
Clinical Research Institute, Health Sciences Center, Texas Tech University, Lubbock, Texas.
J Strength Cond Res. 2019 Jan;33(1):8-16. doi: 10.1519/JSC.0000000000001867.
Chapman, M, Larumbe-Zabala, E, Gosss-Sampson, M, Colpus, M, Triplett, NT, and Naclerio, F. Perceptual, mechanical, and electromyographic responses to different relative loads in the parallel squat. J Strength Cond Res 33(1): 8-16, 2019-The effectiveness of the OMNI-RES (0-10) Scale and the electromyographic signal for monitoring changes in the movement velocity were examined during a set to muscular failure using different percentages of 1 repetition maximum (1RM) in the parallel squat exercise (PSQ). Twelve men (26.3 ± 5.8 years) were evaluated on 8 separate days with 48 hours of rest between sessions. After determining the 1RM value, participants underwent 7 tests until achieving muscular failure with the following percentage ranges: 30 to <40%, 40 to <50%, 50 to <60%, 60 to <70%, 70 to <80%, 80 to <90%, and >90%. An optical rotary encoder measured mean accelerative velocity (MAV), and the OMNI-RES (0-10) Scale was used to express the rating of perceived exertion (RPE) after every repetition of each set. In addition, the normalized root mean square signal of the surface electromyography (N-EMG) was calculated for the vastus medialis muscle. The RPE expressed after the first repetition and when the maximum value of MAV was achieved along the sets was lower (p < 0.001, d > 0.8) than the RPE that corresponded to a 10% drop in MAV and at failure. In addition, the initial RPE was useful to distinguish different loading zones by anchoring the OMNI-RES value to the magnitude of the relative load (<60%, 60 to <70% or ≤70% 1RM). Similar patterns were observed using the N-EMG. In conclusion, apart from differentiating between relative loads during a set to failure in the PSQ, the RPE and the N-EMG can both reflect changes associated with the initial, maximal, 10% drop in movement velocity and the muscular failure.
查普曼、拉鲁姆贝-萨巴拉、戈斯-桑普森、科尔帕斯、特里普利特和纳克里奥研究了在平行深蹲中不同相对负荷下的知觉、力学和肌电反应。2019 年《力量与调节研究杂志》33（1）：8-16 期-在使用平行深蹲（PSQ）中 1 重复最大值（1RM）的不同百分比进行至力竭的一组中，研究了 OMNI-RES（0-10）量表和肌电图信号监测运动速度变化的有效性。12 名男性（26.3±5.8 岁）在 8 个不同的日子里进行了评估，每个测试之间休息 48 小时。在确定 1RM 值后，参与者进行了 7 项测试，直到在以下百分比范围内达到肌肉力竭：30%<40%、40%<50%、50%<60%、60%<70%、70%<80%、80%<90%和>90%。一个光学旋转编码器测量平均加速速度（MAV），并且在每组的每次重复后，使用 OMNI-RES（0-10）量表来表达感知用力（RPE）。此外，计算了股直肌的表面肌电图（N-EMG）的归一化均方根信号。在每组的第一组和达到 MAV 最大值时表达的 RPE（p<0.001，d>0.8）低于与 MAV 下降 10%和力竭时对应的 RPE。此外，初始 RPE 有助于通过将 OMNI-RES 值锚定在相对负荷的大小（<60%、60%<70%或≤70%1RM）来区分不同的负荷区。使用 N-EMG 观察到类似的模式。总之，除了在 PSQ 中一组力竭期间区分相对负荷外，RPE 和 N-EMG 都可以反映与初始、最大、运动速度下降 10%和肌肉力竭相关的变化。
