Institute of Food, Nutrition, and Human Health, Massey University, Private Bag 11-222, Palmerston North, New Zealand.
Eur J Appl Physiol. 2011 Apr;111(4):725-9. doi: 10.1007/s00421-010-1655-8. Epub 2010 Sep 28.
Moderate, acute alcohol consumption after eccentric exercise has been shown to magnify the muscular weakness that is typically associated with exercise-induced muscle damage (EIMD). As it is not known whether this effect is dose-dependent, the aim of this study was to investigate the effect of a low dose of alcohol on EIMD-related losses in muscular performance. Ten healthy males performed 300 maximal eccentric contractions of the quadriceps muscles of one leg on an isokinetic dynamometer. They then consumed either a beverage containing 0.5 g of alcohol per kg bodyweight (as vodka and orange juice) or an isocaloric, isovolumetric non-alcoholic beverage. At least 2 weeks later, they performed an equivalent bout of eccentric exercise on the contralateral leg after which they consumed the other beverage. Measurement of peak and average peak isokinetic (concentric and eccentric) and isometric torque produced by the quadriceps was made before and 36 and 60 h post-exercise. Significant decreases in all measures of muscular performance were observed over time under both conditions (all P < 0.05); however, no difference between treatments was evident at any of the measured time points (all P > 0.05). Therefore, consumption of a low dose of alcohol after damaging exercise appears to have no effect on the loss of force associated with strenuous eccentric exercise.
中度和急性酒精摄入后会加剧与运动引起的肌肉损伤（EIMD）相关的肌肉无力。由于目前尚不清楚这种效应是否存在剂量依赖性，因此本研究旨在探讨低剂量酒精对 EIMD 相关肌肉性能丧失的影响。10 名健康男性在等速测力计上对一条腿的股四头肌进行了 300 次最大离心收缩。然后，他们饮用了一种含有 0.5 克/kg 体重酒精的饮料（如伏特加和橙汁）或等热量、等容量的非酒精饮料。至少 2 周后，他们在对侧腿上进行了同等的离心运动，之后饮用了另一种饮料。在运动前、运动后 36 小时和 60 小时，测量了股四头肌的等速（向心和离心）和等长峰值及平均峰值扭矩。在两种情况下，所有肌肉性能的测量指标均随时间逐渐下降（均 P < 0.05）；然而，在任何测量时间点，两种处理方式之间均无差异（均 P > 0.05）。因此，在剧烈离心运动后摄入低剂量酒精似乎不会对与剧烈离心运动相关的力量损失产生影响。
