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首页> 外文期刊>Isokinetics and exercise science >Effect of a previous high intensity running exercise on isokinetic muscular strength in individuals with different training backgrounds
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Effect of a previous high intensity running exercise on isokinetic muscular strength in individuals with different training backgrounds

机译：先前的高强度跑步运动对具有不同训练背景的个人的等速肌力的影响

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The objective of this study was to compare the effects of high intensity running exercise on the strength of the knee extensors at concentric and eccentric conditions in individuals with different training background. Sixteen physically active (SED), 11 endurance-trained (ET) and 7 strength-trained (ST) subjects volunteered to participate in the study. Initially each subject performed, on different days, one familiarization session on an isokinetic dynamometer and an incremental treadmill test to volitional exhaustion to determine the velocity at the onset of blood lactate accumulation (OBLA). The subjects then returned to the laboratory on two experimental sessions, separated by at least five days, to perform maximal isokinetic eccentric (E) and concentric (C) contractions of the quadriceps at 180deg/s. One session was performed after a standardized warm-up period (5 min at 50%VO_2 max) and the other session was performed after a continuous running at 95% OBLA. The duration of this session was estimated to a caloric expenditure around 500 Kcal. Following this high intensity exercise there was a significant reduction in the peak torque in E in all groups. The percent strength loss in E following the running exercise was statistically higher in ST (16.5%) when compared to SED (6.5%) and ET (7.2%). We thus conclude that the reduction in isokinetic peak torque of the knee extensors after a session of high intensity running exercise at 95% OBLA depends on the contraction type and training background.
机译：这项研究的目的是比较在不同训练背景下，同心和偏心条件下高强度跑步运动对膝盖伸肌力量的影响。自愿参加这项研究的16名体育锻炼（SED），11名耐力训练（ET）和7名力量训练（ST）受试者。最初，每个受试者在不同的日子进行一次等速测力计的熟悉训练，并进行增量跑步机测试以进行自愿性消耗，以确定血乳酸累积（OBLA）发作时的速度。然后受试者在两个实验阶段回到实验室，至少间隔五天，以180度/秒的速度进行股四头肌的最大等速偏心（E）和同心（C）收缩。在标准的预热期后（在50％VO_2 max处5分钟）执行一个会话，在以95％OBLA连续运行后执行另一个会话。本届会议的时间估计约为500大卡的热量消耗。进行这种高强度运动后，所有组中E的峰值扭矩均显着降低。与SED（6.5％）和ET（7.2％）相比，跑步运动后E中力量损失的百分比在ST（16.5％）上具有统计学意义。因此，我们得出的结论是，在95％OBLA的高强度跑步锻炼之后，膝部伸肌的等速运动峰值扭矩的减少取决于收缩类型和训练背景。

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