睡眠前蛋白质补充剂并不能改善英国陆军新兵 (第二部分) 携带货物的恢复
Shaun Chapman1,2, Justin Roberts2, Andrew J Roberts1
1Army Recruit Health and Performance Research, HQ Army Recruiting and Initial Training Command, Medical Branch, UK Ministry of Defence, Upavon, United Kingdom.
Frontiers in nutrition
|December 22, 2023
概括
睡眠前蛋白质补充剂在接受体力苛刻的基本训练的英国陆军新兵中没有增强肌肉恢复. 载荷运动并没有显著损害肌肉功能,这表明训练强度可能不足以从额外的蛋白质中受益.
科学领域:
- 运动生理学 运动生理学
- 运动营养 运动营养
- 军事表现 军事表现
背景情况:
- 英国陆军的基本训练 (BT) 涉及到艰苦的体力活动,恢复能力有限.
- 携带负载,一个关键的BT活动,可以导致运动诱导的肌肉损伤 (EIMD) 和减少肌肉功能.
- 众所周知,蛋白质补充剂通过减轻EIMD和功能丧失来帮助肌肉恢复.
研究的目的:
- 调查睡眠前蛋白质补充剂对英国陆军新兵在载荷车测试后急性肌肉恢复的影响.
- 评估不同剂量的蛋白质 (20g和60g) 对肌肉功能,疼痛和损伤标志物的影响.
主要方法:
- 122名英国陆军新兵 (99名男性,23名女性) 被随机分为四组:饮食控制 (CON),碳水化合物安慰剂 (PLA),中等蛋白质 (MOD,20g) 和高蛋白质 (HIGH,60g).
- 在整个训练过程中,参与者在睡觉前消耗了指定的补充剂.
- 肌肉功能 (跳跃高度),感知疼痛和尿路肌肉损伤标志物 (肌红蛋白,3-甲基胺) 在测试前,测试后立即,24小时后和40小时后进行测量.
主要成果:
- 测试后立即或测试后40小时的组之间没有观察到肌肉功能 (跳跃高度) 的显著差异.
- 在测试后24小时,PLA组的跳跃高度明显高于HIGH蛋白质组 (p=0.037).
- 蛋白质补充剂在任何时间点都没有显著减少肌肉疼痛或肌肉损伤的尿路标记物 (肌球蛋白,3-甲基胺).
结论:
- 睡眠前的蛋白质补充似乎不会在基本训练期间在英国陆军新兵中加快负载运输后的急性肌肉恢复.
- 载荷测试可能没有足够的强度来引起显著的肌肉功能减少,从而限制了蛋白质补充的可观察到的益处.
- 目前的蛋白质摄入量 (约1.2g/kg/天) 可能足够,这表明在类似的训练负载和距离上不需要额外的睡眠前蛋白质.
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