Pedrosa Gustavo Ferreira, Simões Marina Gurgel, Rezende Pereira Mariano, Schoenfeld Brad, Lanza Marcel Bahia, Lima Fernando Vitor, Bischoff Arthur Brum Gonçalvez, Chagas Mauro Heleno, Diniz Rodrigo César Ribeiro
Strength Training Laboratory, Center for Physical Education and Sports, Federal University of Santa Maria, Rio Grande do Sul, Brazil.
Weight Training Laboratory, School of Physical Education, Physiotherapy and Occupational Therapy, Federal University of Minas Gerais, Belo Horizonte, Brazil.
J Sports Sci. 2025 Aug;43(15):1440-1451. doi: 10.1080/02640414.2025.2502895. Epub 2025 May 14.
We compared maximum voluntary isometric action (MVIA), electromyographic (EMG) amplitude, and hypertrophy of rectus femoris (RF) and vastus lateralis (VL) between groups training in different ranges of motion (ROM). Fifty untrained women were randomised into control group (CON) or to perform knee extension exercise in one of the following groups (0°=extended knee): Full ROM (FULL100°-30°), Initial ROM (INITIAL:100°-65°), Final ROM (FINAL:65°-30°), and Varied ROM (VAR: alternating between INITIAL and FINALROM). Pre- and post-training assessments included MVIA at 30º, 65º and 100º of knee flexion, during which EMG amplitude of RF and VL was recorded. Summed changes in cross-sectional area, assessed via ultrasound, were measured at four locations along muscles. Results showed greater improvements in INITIAL and VAR for MVIA at 100º (20.63%-25.5%) and FINAL and VAR for MVIA at 30º (17.28%-17.97%) compared to other groups (-2.92%-9.83% and 0.84%-3.31%, respectively). EMG response was larger in INITIAL than FINAL and CON at 100º (15.84% vs -6.61%-1.16%). FINAL had a higher EMG response than INITIAL at 30º (4.52% vs -14.95%). For hypertrophy, INITIAL, FULL, and VAR showed greatest increases (13.20%-17%). Greater MVIA gains aligned with trained ROM, leading to better VAR results. INITIAL, FULL, and VAR were more effective than FINALROM in hypertrophy.
我们比较了在不同运动范围（ROM）训练的组间，股直肌（RF）和股外侧肌（VL）的最大自主等长动作（MVIA）、肌电图（EMG）幅度以及肥大情况。五十名未经训练的女性被随机分为对照组（CON），或在以下组中进行膝关节伸展运动（0°=伸直膝关节）：全ROM（FULL 100°-30°）、初始ROM（INITIAL：100°-65°）、终末ROM（FINAL：65°-30°）以及变化ROM（VAR：在初始和终末ROM之间交替）。训练前和训练后的评估包括在膝关节屈曲30°、65°和100°时的MVIA，在此期间记录RF和VL的EMG幅度。通过超声评估的肌肉横截面积总和变化在肌肉的四个位置进行测量。结果显示，与其他组相比（分别为-2.92%-9.83%和0.84%-3.31%），初始组和变化组在100°时MVIA改善更大（20.63%-25.5%），终末组和变化组在30°时MVIA改善更大（17.28%-17.97%）。在100°时，初始组的EMG反应比终末组和对照组更大（15.84% 对 -6.61%-1.16%）。在30°时，终末组的EMG反应比初始组更高（4.52% 对 -14.95%）。对于肥大情况，初始组、全ROM组和变化组显示出最大的增加（13.20%-17%）。更大的MVIA增加与训练的ROM一致，导致变化组结果更好。在肥大方面，初始组、全ROM组和变化组比终末ROM组更有效。
