Joo Chang Hwa
Department of Football Science, College of Health Science, Ho Nam University, Gwangju, Korea.
J Exerc Rehabil. 2015 Apr 30;11(2):112-8. doi: 10.12965/jer.15195. eCollection 2015 Apr.
The aim of the present study was to devise a non-damaging high-intensity intermittent running protocol. Ten healthy active men completed high-intensity interval running (8× 3-min bouts at 90% of maximal oxygen uptake interspersed with 3-min recovery) on a motorized treadmill under normal laboratory temperatures. Mean heart rate and rating of perceived exertion significantly increased during the intermittent protocol (the first bout, 15.3± 1.2; the final bout, 18.6± 0.9; P< 0.001). Blood lactate concentrations were significantly elevated following bout 1 compared with resting values (1.2± 0.3 mmol/L vs 5.4± 2.4 mmol/L; P = 0.03). However, no significant reduction in maximal voluntary contraction was observed immediately after completing the last exercise bout (623.9± 143.6 N) or during the subsequent 7-d period compared to pre-exercise values (P = 0.59). Creatine kinase (CK) concentrations were not significantly increased following exercise or during the subsequent 7-d period (P = 0.96). Myoglobin (Mb) content was significantly increased following exercise (P = 0.01), however, values returned towards pre-exercise concentrations after 24 h. These results indicate that the high-intensity intermittent running protocol induced changes in physiological and subjective indices that are consistent with the effects of acute fatigue as opposed to those changes normally associated with exercise-induced muscle damage. This exercise protocol can therefore be used to investigate the influence of high-intensity exercise from physiological responses to molecular adaptation.
本研究的目的是设计一种无损伤的高强度间歇跑步方案。10名健康的活跃男性在正常实验室温度下，于电动跑步机上完成了高强度间歇跑步（8组，每组3分钟，强度为最大摄氧量的90%，组间穿插3分钟恢复时间）。在间歇运动方案期间，平均心率和主观用力程度显著增加（第一组，15.3±1.2；最后一组，18.6±0.9；P<0.001）。与静息值相比，第1组运动后血乳酸浓度显著升高（1.2±0.3 mmol/L对5.4±2.4 mmol/L；P = 0.03）。然而，在完成最后一组运动后即刻（623.9±143.6 N）或随后7天内，与运动前值相比，最大自主收缩未见显著降低（P = 0.59）。运动后及随后7天内肌酸激酶（CK）浓度未显著升高（P = 0.96）。运动后肌红蛋白（Mb）含量显著增加（P = 0.01），然而，24小时后其值恢复至运动前浓度。这些结果表明，高强度间歇跑步方案引起的生理和主观指标变化与急性疲劳的影响一致，而非通常与运动诱导的肌肉损伤相关的变化。因此，该运动方案可用于研究高强度运动从生理反应到分子适应的影响。
