Human Kinetics, St. Francis Xavier University, Antigonish, Canada.
McMaster University Faculty of Health Sciences, Medicine, Hamilton, Canada.
Int J Sports Med. 2017 Dec;38(14):1061-1069. doi: 10.1055/s-0043-119874. Epub 2017 Oct 18.
This study determined whether ingesting a carbohydrate-electrolyte solution (CES) vs. progressive dehydration affected skeletal muscle glycogen use and performance in ice hockey players during simulated ice hockey exercise comprised of 3 active "periods". Seven males (21.3±0.3 years, 184.7±1.2 cm, 84.2±3.9 kg, and 49.6±1.8 mL·kg·min) performed a hockey-specific protocol on two occasions and either dehydrated progressively (NF), or stayed well-hydrated by ingesting a CES. Muscle biopsies were taken at rest, before the 3 period (P3), and after the final sprint in the protocol. Compared to dehydration in the NF trial (-1.8% BM), CES ingestion enhanced voluntary performance (151.0±8.0 vs. 144.1±8.7 kJ) and glycogen use (177.5±31.1 vs. 103.5±16.2 mmol·kg dm), and reduced perceived exertion (16±1 vs. 18±1) in P3. Mean core temperature was reduced by CES ingestion throughout the protocol (38.0±0.2 vs. 38.1±0.1°C). These results suggest that compared to progressive dehydration, staying hydrated by ingesting a CES helps preserve performance, while reducing thermal and perceptual strains, in P3 of cycle-based simulation of ice hockey exercise. These benefits are observed despite greater glycogen use in P3 with CES ingestion.
本研究旨在确定在模拟冰球运动中，摄入碳水化合物-电解质溶液（CES）与逐渐脱水相比，是否会影响冰球运动员的骨骼肌糖原利用和表现。7 名男性（21.3±0.3 岁，184.7±1.2cm，84.2±3.9kg，49.6±1.8mL·kg·min）在两种情况下进行了特定于冰球的运动，要么逐渐脱水（NF），要么通过摄入 CES 保持良好的水分状态。在休息时、3 个周期前（P3）和协议中的最后冲刺后，分别从肌肉活检中取样。与 NF 试验中的脱水（-1.8% BM）相比，CES 摄入增强了自愿性能（151.0±8.0 比 144.1±8.7 kJ）和糖原利用（177.5±31.1 比 103.5±16.2 mmol·kg dm），并降低了 P3 时的感知努力（16±1 比 18±1）。在整个协议中，CES 摄入使核心温度降低（38.0±0.2 比 38.1±0.1°C）。与逐渐脱水相比，CES 摄入可帮助保持 P3 中的性能，同时减少热和感知压力，这些益处是在 P3 中 CES 摄入导致更大的糖原利用的情况下观察到的。
