Research Laboratory Sports performance optimization National Center of Medicine and Science in Sports (CNMSS), Tunis, Tunisia.
Int J Sports Med. 2012 Nov;33(11):886-91. doi: 10.1055/s-0032-1301887. Epub 2012 Jul 12.
The study investigated if markers of muscle injury and antioxidant status were affected by a Wingate test performed at 2 different times of day. 15 young male footballers performed 2 tests (randomized) at 07:00-h and 17:00-h. Fasting blood samples were collected before and 3 min after each test for assessment of markers of muscle injury and antioxidant status. Resting oral temperature was recorded during each session. Peak power (10.76 ± 1.05 vs. 11.15 ± 0.83 W.kg( - 1)) and fatigue index (0.41 ± 0.04 vs. 0.49 ± 0.13%) during the Wingate test, and core temperature, were significantly higher (all p<0.05) in the evening. Markers of muscle injury were significantly higher in the evening before and after exercise (e. g., 148.7 ± 67.05 vs. 195 ± 74.6 and 191.6 ± 79.52 vs. 263.6 ± 96.06 IU.L (- 1), respectively, for creatine kinase; both p<0.001). Antioxidant parameters increased after the Wingate test but only resting values were significantly higher in the morning (e. g., 1.33 ± 0.19 vs. 1.19 ± 0.14 µmol.L (- 1) for total antioxidant status; p<0.05). The results indicate that muscle injury and antioxidant activity after the Wingate test were higher in the evening, suggesting a possible link between the biochemical measures and the diurnal fluctuation of anaerobic performance. However, repetition of this study after prescribed rather than self-selected exercise intensity is recommended.
这项研究调查了在一天中的不同时间进行两次蛙跳测试是否会影响肌肉损伤和抗氧化状态的标志物。15 名年轻男性足球运动员在 07:00 和 17:00 分别进行了 2 次测试（随机）。在每次测试前后 3 分钟内采集空腹血样，以评估肌肉损伤和抗氧化状态的标志物。在每次测试过程中记录静息口腔温度。在蛙跳测试中，峰值功率（10.76 ± 1.05 与 11.15 ± 0.83 W.kg(−1)）和疲劳指数（0.41 ± 0.04 与 0.49 ± 0.13%）以及核心温度，在晚上均显著更高（均 p<0.05）。在晚上运动前后，肌肉损伤标志物显著更高（例如，肌酸激酶分别为 148.7 ± 67.05 与 195 ± 74.6 和 191.6 ± 79.52 与 263.6 ± 96.06 IU.L(−1)，均 p<0.001）。抗氧化参数在进行蛙跳测试后增加，但只有在早上静息值更高（例如，总抗氧化状态分别为 1.33 ± 0.19 与 1.19 ± 0.14 µmol.L(−1)，p<0.05）。结果表明，在晚上进行蛙跳测试后肌肉损伤和抗氧化活性更高，这表明生化测量与无氧表现的昼夜波动之间可能存在联系。然而，建议在规定的而不是自我选择的运动强度后重复进行这项研究。
