Farthing Jonathan P, Chilibeck Philip D
College of Kinesiology, University of Saskatchewan, 105 Gymnasium Place, Saskatoon, Saskatchewan, S7N 5C2, Canada.
Eur J Appl Physiol. 2003 Aug;89(6):578-86. doi: 10.1007/s00421-003-0842-2. Epub 2003 May 17.
The purpose of this study was to examine the effect of isokinetic eccentric (ECC) and concentric (CON) training at two velocities [fast, 180 degrees s(-1 )(3.14 rad s(-1)) and slow,30 degrees s(-1)(0.52 rad s(-1))] on muscle hypertrophy. Twenty-four untrained volunteers (age 18-36 years) participated in fast- ( n=13) or slow- ( n=11) velocity training, where they trained one arm eccentrically for 8 weeks followed by CON training of the opposite arm for 8 weeks. Ten subjects served as controls (CNT). Subjects were tested before and after training for elbow flexor muscle thickness by sonography and isokinetic strength (Biodex). Overall, ECC training resulted in greater hypertrophy than CON training (P<0.01). No significant strength or hypertrophy changes occurred in the CNT group. ECC (180 degrees s(-1)) training resulted in greater hypertrophy than CON (180 degrees s(-1)) training and CON (30 degrees s(-1)) training (P<0.01). ECC (30 degrees s(-1)) training resulted in greater hypertrophy than CON (180 degrees s(-1)) training (P<0.05), but not CON (30 degrees s(-1)) training. ECC (180 degrees s(-1)) training resulted in the greatest increases in strength (P<0.01). We conclude that ECC fast training is the most effective for muscle hypertrophy and strength gain.
本研究旨在探讨等速离心（ECC）和向心（CON）训练在两种速度[快速，180度/秒（3.14弧度/秒）和慢速，30度/秒（0.52弧度/秒）]下对肌肉肥大的影响。24名未经训练的志愿者（年龄18 - 36岁）参与快速（n = 13）或慢速（n = 11）速度训练，他们先对一只手臂进行8周的离心训练，随后对另一只手臂进行8周的向心训练。10名受试者作为对照组（CNT）。在训练前后，通过超声检查和等速肌力测试（Biodex）对受试者的肘屈肌厚度进行检测。总体而言，离心训练比向心训练导致更大的肌肉肥大（P<0.01）。对照组未出现显著的力量或肌肉肥大变化。离心（180度/秒）训练比向心（180度/秒）训练和向心（30度/秒）训练导致更大的肌肉肥大（P<0.01）。离心（30度/秒）训练比向心（180度/秒）训练导致更大的肌肉肥大（P<0.05），但与向心（30度/秒）训练相比无显著差异。离心（180度/秒）训练导致力量增加最大（P<0.01）。我们得出结论，离心快速训练对肌肉肥大和力量增长最为有效。
