Zabaleta-Korta Aitor, Fernández-Peña Eneko, Torres-Unda Jon, Francés Maider, Zubillaga Asier, Santos-Concejero Jordan
Sports and Education Department, University of the Basque Country (UPV/EHU), Vitoria-Gasteiz, Spain.
Physiotherapy Department, University of the Basque Country (UPV/EHU), Leioa, Spain.
J Hum Kinet. 2023 Jul 15;87:259-270. doi: 10.5114/jhk/163561. eCollection 2023 Jul.
The aim of the present study was to analyse the role of exercises' resistance profile in regional hypertrophy. Thirty-eight healthy women completed a 9-week resistance training program consisting of either 4 sets of 12 repetitions to volitional failure of inclined bicep curls (INC group) or preacher curls (PREA group), three times per week. Pre- and post-intervention muscle thickness was measured using B-mode ultrasound imaging with a linear-array transducer. Scan acquisition sites were determined by measuring 50%, 60% and 70% of the distance between the posterior crest of the acromion and the olecranon. Statistical significance was set at p < 0.05. No region of the INC group grew when comparing pre- to post-intervention. The 70% region of the PREA group grew significantly (muscle thickness increased from 2.7 ± 0.43 cm to 2.94 ± 0.44 cm). We found no growth differences between regions when analysing per group (p = 0.274), region (p = 0.571) or group*region (p = 0.367). Our results show that the distal region of the arm grows in response to the preacher curl that places the highest amount of strain in the range of motion in which the arm muscles are more elongated.
本研究的目的是分析运动的阻力特征在局部肥大中的作用。38名健康女性完成了一项为期9周的阻力训练计划，该计划包括每周进行三次，每组4组，每组12次重复，直至完成斜托弯举（INC组）或牧师椅弯举（PREA组）的力竭。干预前后使用线性阵列换能器通过B超成像测量肌肉厚度。扫描采集部位通过测量肩峰后嵴与尺骨鹰嘴之间距离的50%、60%和70%来确定。统计学显著性设定为p<0.05。比较INC组干预前后，没有区域出现增长。PREA组的70%区域显著增长（肌肉厚度从2.7±0.43厘米增加到2.94±0.44厘米）。在按组（p = 0.274）、区域（p = 0.571）或组*区域（p = 0.367）分析时，我们发现各区域之间没有生长差异。我们的结果表明，手臂的远端区域会因牧师椅弯举而生长，该动作在手臂肌肉更伸展的运动范围内施加了最大量的应变。
