School of Exercise, Biomedical and Health Sciences, Edith Cowan University Joondalup, Western Australia, Australia.
J Strength Cond Res. 2011 Jan;25(1):211-9. doi: 10.1519/JSC.0b013e3181bac2bd.
This study tested the hypothesis that the first exercise bout consisting of slow-velocity (30° · s(-1)) maximal lengthening contractions would not affect muscle damage in a subsequent bout consisting of fast-velocity (210° · s(-1)) lengthening contractions. Eighteen men were randomly assigned into either a repeated bout group (n = 10) or control group (n = 8). The repeated bout group performed 2 bouts of exercise consisting of 210 maximal lengthening contractions of the elbow flexors separated by 14 days at a velocity of 30° · s(-1) for the first and 210° · s(-1) for the second bout. The control group performed a single bout of the fast-velocity exercise. Changes in maximal isometric strength, range of motion (ROM), upper-arm circumference, muscle thickness, muscle soreness, serum creatine kinase, and lactate dehydrogenase activities were measured before, immediately after, and 24 to 96 hours after exercise. The repeated bout group showed significantly (p < 0.05) smaller changes in all criterion measures except for muscle soreness after the fast-velocity exercise compared with the control group. A significant (p < 0.05) difference was evident only for ROM between the slow- and fast-velocity bouts of the repeated bout group. These results suggest that slow-velocity exercise reduced muscle damage induced by fast-velocity exercise, although the reduction was not large.
这项研究检验了这样一个假设，即第一组运动由慢速度（30°·s(-1)）的最大伸展收缩组成，不会影响随后由快速度（210°·s(-1)）的伸展收缩组成的运动中的肌肉损伤。18 名男性被随机分配到重复运动组（n=10）或对照组（n=8）。重复运动组进行了两次运动，每次运动包括 210 次最大伸展收缩的肘部屈肌，两次运动之间间隔 14 天，第一次运动的速度为 30°·s(-1)，第二次运动的速度为 210°·s(-1)。对照组进行了一次快速度的单一运动。在运动前、运动后即刻以及运动后 24 至 96 小时，测量最大等长力量、运动范围（ROM）、上臂周长、肌肉厚度、肌肉酸痛、血清肌酸激酶和乳酸脱氢酶活性的变化。与对照组相比，重复运动组在所有标准测量指标中（除了快速度运动后的肌肉酸痛）的变化明显较小（p<0.05）。只有在重复运动组的慢速度和快速度运动之间，ROM 才有明显的差异（p<0.05）。这些结果表明，慢速度运动减轻了快速度运动引起的肌肉损伤，尽管减轻程度不大。
