多种成分的运动前补充剂改变了能量系统的贡献，并提高了活跃个体在高强度间歇运动中的表现：一项双盲和安慰剂对照研究。
Multi-ingredient pre-workout supplementation changes energy system contribution and improves performance during high-intensity intermittent exercise in physically active individuals: a double-blind and placebo controlled study.
机构信息
Exercise and Immunometabolism Research Group, Department of Physical Education, School of Technology and Sciences, Presidente Prudente, São Paulo, Brazil; Post Graduation Program in Physical Therapy, São Paulo State University (UNESP), São Paulo, Brazil.
Immunometabolism of Skeletal Muscle and Exercise Research Group, Department of Physical Education and Associate Graduate Program in Health Science, Federal University of Piauí (UFPI), Teresina, PI, Brazil.
出版信息
J Int Soc Sports Nutr. 2020 Jun 3;17(1):30. doi: 10.1186/s12970-020-00357-6.
BACKGROUND
Nutritional ergogenic aids are commonly used to boost physiological adaptations to exercise and promote greater fitness gains. However, there is a paucity of data about multi-ingredient pre-workout supplementation (MIPS). Therefore, the aim of the present study was to investigate the acute effects of MIPS on the oxidative, glycolytic and ATP-CP energy systems contribution, time spent above 90% V̇O (T90% V̇O), excess post-exercise oxygen consumption (EPOC) magnitude, number of efforts and time to exhaustion during a high-intensity interval exercise (HIIE) session.
METHODS
Twelve physically-active and healthy men completed the HIIE sessions that involved running bouts of 15 s on the treadmill at 120% of the maximum aerobic speed (MAS), interspersed with 15 s of passive recovery. Blood lactate was collected at immediately post, 3, 5, and 7 min post exercise. The contribution of ATP-CP, glycolytic and oxidative systems was analyzed at rest, during the HIIE sessions and for 20 min post. Performance variables (time to exhaustion, number of efforts) and oxygen consumption were also analyzed.
RESULTS
MIPS significantly increased the number of efforts performed (MIPS: 41 ± 10 vs Placebo: 36 ± 12, p = 0.0220) and time to exhaustion (MIPS: 20.1 ± 6 min vs Placebo: 17 ± 5 min, p = 0.0226). There was no difference between supplements for both T90% V̇O (p = 0.9705) and EPOC (p = 0.4930). Consuming MIPS significantly increased the absolute oxidative energy system contribution by 23.8% (p = 0.0163) and the absolute ATP-CP contribution by 28.4% (p = 0.0055) compared to placebo. There was only a non-significant tendency for a higher glycolytic system contribution after MIPS ingestion (p = 0.0683).
CONCLUSION
Acute MIPS ingestion appears effective at increasing both aerobic and anaerobic alactic energy contribution and time to exhaustion during a HIIE protocol.
背景
营养性运动补剂常用于促进运动中的生理适应，提高健身效果。然而，关于多成分运动前补剂（MIPS）的资料却很少。因此，本研究旨在探究 MIPS 对高强度间歇运动（HIIE）期间氧化、糖酵解和 ATP-CP 能量系统贡献、90%最大摄氧量（V̇O）以上时间（T90% V̇O）、运动后过量耗氧量（EPOC）大小、努力次数和力竭时间的急性影响。
方法
12 名身体健康的男性进行了 HIIE 测试，包括在跑步机上以最大有氧速度（MAS）的 120%跑 15 秒，然后进行 15 秒的被动恢复。运动后立即、3 分钟、5 分钟和 7 分钟采集血乳酸。在休息时、HIIE 期间以及运动后 20 分钟分析 ATP-CP、糖酵解和氧化系统的贡献。还分析了运动表现变量（力竭时间、努力次数）和耗氧量。
结果
MIPS 显著增加了完成的努力次数（MIPS：41±10 次 vs 安慰剂：36±12 次，p=0.0220）和力竭时间（MIPS：20.1±6 分钟 vs 安慰剂：17±5 分钟，p=0.0226）。两种补剂在 T90% V̇O（p=0.9705）和 EPOC（p=0.4930）方面没有差异。与安慰剂相比，MIPS 显著增加了绝对氧化能量系统贡献 23.8%（p=0.0163）和绝对 ATP-CP 贡献 28.4%（p=0.0055）。MIPS 摄入后糖酵解系统贡献有增加的趋势，但没有统计学意义（p=0.0683）。
结论
急性 MIPS 摄入似乎能有效提高 HIIE 方案中的有氧和无氧非乳酸能量贡献以及力竭时间。
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