School of Science and Technology, Nottingham Trent University, Nottingham, UK.
Scand J Med Sci Sports. 2012 Jun;22(3):430-8. doi: 10.1111/j.1600-0838.2010.01230.x. Epub 2010 Oct 25.
The purpose of this study was to determine the effects of 2% hypohydration on skill performance in elite female field hockey players following intermittent exercise in the heat. Eight elite female field hockey players performed 50 min of a field hockey-specific intermittent treadmill running protocol (FHITP) in hot environmental conditions (33 °C, 60% relative humidity) in different hydration states: euhydrated (EUH) and hypohydrated by 2% body mass (HYPO). Hydration status was manipulated via a period (121±10 min) of passive hyperthermia (40 °C, 75% relative humidity) and controlled fluid intake 1 day preceding testing. Ad libitum fluid intake was permitted throughout both trials. Field hockey skill tests were performed pre- and post-FHITP. Skill performance time increased (P=0.029) in the HYPO trial compared with the EUH trial, which may be attributed to an increase in penalty time (P=0.024). Decision-making time increased (P=0.008) in the HYPO trial and was significantly impaired compared with EUH (P=0.016) pre-FHITP. Ad libitum drinking appeared to be sufficient to maintain decision-making performance as no interaction effects were evident post-FHITP. Players who commence match-play in a state of hypohydration may be susceptible to decrements in skill and decision-making performance.
本研究旨在确定在热环境下间歇性运动后，2%脱水对精英女子曲棍球运动员技能表现的影响。8 名精英女子曲棍球运动员在不同的水合状态下（Euhydrated [EUH] 和脱水 2%体重 [HYPO]）进行了 50 分钟的特定于曲棍球的间歇性跑步机跑步方案（FHITP）：在热环境条件下（33°C，60%相对湿度）进行；脱水状态通过在测试前一天进行 121±10 分钟的被动高温（40°C，75%相对湿度）和控制液体摄入来调节。在两次试验中均允许随意摄入液体。在 FHITP 前后进行曲棍球技能测试。与 EUH 试验相比，HYPO 试验中的技能表现时间增加（P=0.029），这可能归因于罚球时间增加（P=0.024）。HYPO 试验中的决策时间增加（P=0.008），并且与 EUH 相比，在 FHITP 前显著受损（P=0.016）。随意饮水似乎足以维持决策表现，因为 FHITP 后没有明显的交互作用。在脱水状态下开始比赛的运动员可能容易出现技能和决策表现下降的情况。
