热暴露和热水浸泡导致 3%脱水对重复循环冲刺表现的影响。
Effects of heat exposure and 3% dehydration achieved via hot water immersion on repeated cycle sprint performance.
机构信息
Health Physical Education and Recreation, Missouri Western State University, St Joseph, Missouri, USA.
出版信息
J Strength Cond Res. 2011 Mar;25(3):778-86. doi: 10.1519/JSC.0b013e3181c1f79d.
This study examined effects of heat exposure with and without dehydration on repeated anaerobic cycling. Males (n = 10) completed 3 trials: control (CT), water-bath heat exposure (∼39°C) to 3% dehydration (with fluid replacement) (HE), and similar heat exposure to 3% dehydration (DEHY). Hematocrit increased significantly from pre to postheat immersion in both HE and DEHY. Participants performed 6 × 15s cycle sprints (30s active recovery). Mean Power (MP) was significantly lower vs. CT (596 ± 66 W) for DEHY (569 ± 72 W), and the difference approached significance for HE (582 ± 76 W, p = 0.07). Peak Power (PP) was significantly lower vs. CT (900 ± 117 W) for HE (870 ± 128 W) and approached significance for DEHY (857 ± 145 W, p = 0.07). Postsprint ratings of perceived exertion was higher during DEHY (6.4 ± 2.0) and HE (6.3 ± 1.6) than CT (5.7 ± 2.1). Combined heat and dehydration impaired MP and PP (decrements greatest in later bouts) with HE performance intermediate to CT and DEHY.
本研究探讨了在有和没有脱水的情况下暴露于热环境对重复无氧循环的影响。男性（n = 10）完成了 3 项试验：对照（CT）、水浴热暴露（~39°C）至 3%脱水（含液体补充）（HE）和类似的热暴露至 3%脱水（DEHY）。在 HE 和 DEHY 中，热浸后红细胞比容均显著升高。参与者进行了 6 次×15 秒的自行车冲刺（30 秒主动恢复）。与 CT（596 ± 66 W）相比，DEHY（569 ± 72 W）的平均功率（MP）明显降低，HE（582 ± 76 W，p = 0.07）也接近显著差异。与 CT（900 ± 117 W）相比，HE（870 ± 128 W）和 DEHY（857 ± 145 W，p = 0.07）的峰值功率（PP）明显降低。DEHY（6.4 ± 2.0）和 HE（6.3 ± 1.6）的冲刺后感觉用力程度高于 CT（5.7 ± 2.1）。综合热和脱水会降低 MP 和 PP（后期冲刺的下降幅度最大），HE 的表现介于 CT 和 DEHY 之间。
Zotero 插件