Department of Science and Health, Institute of Technology Carlow, R93 V960 Carlow, Ireland.
School of Biomedical, Nutritional and Sport Sciences, Newcastle University, Newcastle Upon Tyne NE2 4HH, UK.
Nutrients. 2019 Dec 31;12(1):112. doi: 10.3390/nu12010112.
This study investigated the effects of cow's milk on recovery from repeated simulated team games (STGs) in females. Twenty female team-sport athletes completed an STG circuit (2x ~ 30 min, with 10 min 'half-time'). Measures of muscle function, soreness and tiredness, symptoms of stress and serum markers of muscle damage and oxidative stress were determined pre- and 24 h, 48 h, 72 h and 96 h following the circuit. At 48 h, a second STG was completed. Sprint performance (5 m, 15 m), lap time, countermovement jump (CMJ), heart rate and RPE were recorded during each STG. Immediately following each STG, participants consumed either 500 mL of cow's milk (MILK) or 500 mL of an energy-matched carbohydrate (CHO) solution. Compared to CHO, MILK had a beneficial effect in attenuating losses in peak torque for knee extension (60°/s) (likely; effect size (ES) = 0.26 to 0.28) knee flexion (60°/s) (likely; ES = 0.45 to 0.61). A benefit for MILK was observed for 5 m sprint (possible-likely; ES = 0.40 to 0.58), 10 m sprint (likely; ES = 0.30 to 0.53) and symptoms of stress (likely-very likely, small). Mostly unclear outcomes for other variables were observed. For STG variables, trivial (HR, CMJ) and unclear (5 m sprint, 15 m sprint, lap-time, RPE) outcomes were recorded. In conclusion, the consumption of 500 mL of milk attenuated losses in muscle function and perceptions of stress following repeated simulated team-sports games. However, further investigation is warranted to determine whether MILK can influence subsequent team-sport performance.
本研究旨在探讨牛奶对女性重复模拟团队运动（STG）后恢复的影响。20 名女性团队运动运动员完成了一个 STG 循环（2x~30 分钟，有 10 分钟的中场休息）。在循环前、24 小时、48 小时、72 小时和 96 小时测量肌肉功能、酸痛和疲劳、应激症状以及血清肌肉损伤和氧化应激标志物。在 48 小时，完成了第二个 STG。在每个 STG 期间记录 5 米、15 米冲刺表现、圈速、反跳式跳跃（CMJ）、心率和 RPE。在每个 STG 后立即，参与者饮用 500 毫升牛奶（MILK）或 500 毫升能量匹配的碳水化合物（CHO）溶液。与 CHO 相比，MILK 对减缓膝关节伸展（60°/s）（可能；效应大小（ES）=0.26 至 0.28）和膝关节屈曲（60°/s）（可能；ES=0.45 至 0.61）的峰值扭矩损失有有益的影响。对于 5 米冲刺（可能-很可能；ES=0.40 至 0.58）、10 米冲刺（很可能；ES=0.30 至 0.53）和应激症状（很可能-非常可能，小），观察到 MILK 的益处。对于其他变量，观察到的结果大多不清楚。对于 STG 变量，记录到轻微（HR，CMJ）和不清楚（5 米冲刺，15 米冲刺，圈速，RPE）的结果。总之，饮用 500 毫升牛奶可减轻重复模拟团队运动后肌肉功能和应激感知的损失。然而，需要进一步的研究来确定 MILK 是否可以影响随后的团队运动表现。
