Department of Sport and Exercise Sciences, University of Chester, Chester, United Kingdom.
J Strength Cond Res. 2011 Aug;25(8):2185-92. doi: 10.1519/JSC.0b013e3181e86148.
Previous research has advocated that plyometric training improves endurance performance. However, a consequence of such a training is the immediate and prolonged appearance of exercise-induced muscle damage (EIMD). This study examined whether a single bout of plyometric exercise, designed to elicit muscle damage, affected cycling endurance performance. Seventeen participants were randomly assigned to either a muscle damage (n = 7 men, 1 woman) or nonmuscle damage (n = 8 men, 1 woman) group. Before and at 48 hours, participants were measured for perceived muscle soreness, peak isokinetic strength, and physiological, metabolic, and perceptual responses during 5-minute submaximal cycling at ventilatory threshold (VT) and a 15-minute time trial. Perceived muscle soreness and isokinetic strength (p < 0.05) were significantly altered in the muscle damage group after EIMD. No changes in heart rate or blood lactate were evident during submaximal exercise (p > 0.05). However, VO2, V(E), and rating of perceived exertion (RPE) values were increased at VT in the muscle damage group at 48 hours after EIMD (p < 0.05). During the time trial, mean power output, distance covered, and VO2 were lower in the muscle damage group at 48 hours after EIMD (p < 0.05). However, there was no change in RPE (p > 0.05), suggesting effort perception was unchanged during time-trial performance after EIMD. In conclusion, individuals using concurrent plyometric and endurance training programs to improve endurance performance should be aware of the acute impact of muscle-damaging exercise on subsequent cycling performance.
先前的研究主张，增强式训练可以提高耐力表现。然而，这种训练的一个后果是运动引起的肌肉损伤（EIMD）的即时和持久出现。本研究探讨了单次增强式运动是否会影响自行车耐力表现，这种运动旨在引起肌肉损伤。17 名参与者被随机分配到肌肉损伤组（n = 7 名男性，1 名女性）或非肌肉损伤组（n = 8 名男性，1 名女性）。在 EIMD 之前和 48 小时，参与者测量了肌肉酸痛、峰值等速力量以及在通气阈值（VT）下进行 5 分钟亚最大强度自行车运动和 15 分钟计时赛期间的生理、代谢和感知反应。在 EIMD 后，肌肉损伤组的肌肉酸痛和等速力量（p < 0.05）明显改变。在亚最大强度运动期间，心率或血乳酸没有明显变化（p > 0.05）。然而，在 EIMD 后 48 小时，VT 时 VO2、VE 和感知努力（RPE）值在肌肉损伤组中增加（p < 0.05）。在计时赛中，在 EIMD 后 48 小时，肌肉损伤组的平均功率输出、覆盖距离和 VO2 较低（p < 0.05）。然而，RPE 没有变化（p > 0.05），这表明在 EIMD 后进行计时赛时，努力感知没有改变。总之，使用同时进行的增强式和耐力训练计划来提高耐力表现的个体应该意识到肌肉损伤运动对随后的自行车表现的急性影响。
