Waldron Mark, Villerius Vincent, Murphy Aron
a Exercise and Sports Sciences, School of Science & Technology , University of New England , Armidale , Australia.
J Sports Sci. 2015;33(8):786-94. doi: 10.1080/02640414.2014.962579. Epub 2014 Nov 14.
We compared the effects of (1) accurate and (2) surreptitiously augmented performance feedback on power output and physiological responses to a 4000 m time-trial in the heat. Nine cyclists completed a baseline (BaseL) 4000 m time-trial in ambient temperatures of 30°C, followed by two further 4000 m time-trials at the same temperature, randomly assigning the participants to an accurate (ACC; accurate feedback of baseline) or deceived (DEC; 2% increase above baseline) feedback group. The total power output (PO) and aerobic (Paer) and anaerobic (Pan) contributions were determined at 0.4 km stages during the time-trials, alongside measurements of rectal (Trec) and skin (Tskin) temperatures. There were no differences (P > 0.05) in any of the variables between BaseL, ACC and DEC, despite increases (P < 0.05) in Trec and Tskin. Typical pacing profiles were demonstrated; however, there was no interaction (P > 0.05) between feedback condition and time-trial stage. Providing surreptitiously augmented performance feedback to well-trained cyclists did not alter their performance or physiological responses to a 4000 m time-trial in a hot environment. The assumed influence of augmented performance feedback was nullified in the heat, perhaps reflecting a central down-regulation of exercise intensity in response to an increased body temperature.
我们比较了（1）准确的和（2）暗中增加的表现反馈对功率输出以及在高温环境下进行4000米计时赛时生理反应的影响。九名自行车运动员在30°C的环境温度下完成了一次基线（BaseL）4000米计时赛，随后在相同温度下又进行了两次4000米计时赛，将参与者随机分配到准确（ACC；基线的准确反馈）或欺骗（DEC；比基线高2%）反馈组。在计时赛的0.4公里阶段确定总功率输出（PO）以及有氧（Paer）和无氧（Pan）贡献，同时测量直肠温度（Trec）和皮肤温度（Tskin）。尽管Trec和Tskin有所升高（P < 0.05），但BaseL、ACC和DEC之间在任何变量上均无差异（P > 0.05）。呈现出了典型的配速模式；然而，反馈条件和计时赛阶段之间没有交互作用（P > 0.05）。向训练有素的自行车运动员提供暗中增加的表现反馈，并未改变他们在炎热环境下进行4000米计时赛的表现或生理反应。在高温环境下，假定的增强表现反馈的影响被抵消了，这可能反映了身体温度升高时运动强度的中枢下调。
