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首页> 外文期刊>Journal of athletic training >Self-Paced Exercise Performance .in-the. Heat After Pre-Exercise Cold-Fluid Ingestion
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Self-Paced Exercise Performance .in-the. Heat After Pre-Exercise Cold-Fluid Ingestion

机译：自定进度的锻炼表现。运动前摄入冷流体后的热量

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Context: Precooling is the pre-exercise reduction of body temperature and is an effective method of improving physiologic function and exercise performance in environmental heat. A practical and effective method of precooling suitable for application at athletic venues has not been demonstrated. Objective: To confirm the effectiveness of pre-exercise ingestion of cold fluid without fluid ingestion during exercise on pre-exercise core temperature and to determine whether pre-exercise ingestion of cold fluid alone without continued provision of cold fluid during exercise can improve exercise performance in the heat. Design: Randomized controlled clinical trial. Setting: Environmental chamber at an exercise physiology laboratory that was maintained at 32degC, 60% relative humidity, and 3.2 m/s facing air velocity. Patients or Other Participants: Seven male recreational cyclists (age = 21 +-1.5 years, height = 1.81 +-0.07 m, mass = 78.4 +-9.2 kg) participated. Intervention(s): Participants ingested 900 ml_ of cold (2deg) or control (37degC) flavored water in 3 300-mL aliquots over 35 minutes of pre-exercise rest. Main Outcome Measure(s): Rectal temperature and thermal comfort before exercise and distance cycled, power output, pacing, rectal temperature, mean skin temperature, heart rate, blood lactate, thermal comfort, perceived exertion, and sweat loss during exercise. Results: During rest, a greater decrease in rectal temperature was observed with ingestion of the cold fluid (0.41 +-0.16degC) than the control fluid (0.17+-0.17degC) over 35 to 5 minutes before exercise (t_6=-3.47, P=.01). During exercise, rectal temperature was lower after ingestion of the cold fluid at 5 to 25 minutes (t_6 range, 2.53-3.38, P<=.05). Distance cycled was greater after ingestion of the cold fluid (19.26+-2.91 km) than after ingestion of the control fluid (18.72+-2.59 km; t_6=-2.80, P = .03). Mean power output also was greater after ingestion of the cold fluid (275+-27 W) than the cont...
机译：背景：预冷是运动前降低体温的一种方法，是改善环境热中的生理功能和运动表现的有效方法。尚未证明适用于运动场馆的实用且有效的预冷方法。目的：确认运动前不进食冷水的运动前摄入对锻炼前的体温的有效性，并确定运动前不继续进食冷水的运动前单独摄入是否可以改善运动能力。热度。设计：随机对照临床试验。地点：运动生理实验室的环境室，保持在32℃，60％相对湿度和3.2 m / s的空气速度下。患者或其他参与者：七名男性休闲自行车手（年龄= 21 + -1.5岁，身高= 1.81 + -0.07 m，质量= 78.4 + -9.2 kg）。干预：参与者在运动前休息35分钟内，以3 300 mL等分试样摄入了900毫升冷（2度）或对照（37度）调味水。主要指标：运动前的直肠温度和热舒适度以及骑车距离的变化，功率输出，起搏，直肠温度，平均皮肤温度，心率，血液乳酸，热舒适度，运动时的体力消耗和汗水流失。结果：在休息前，运动前35至5分钟内，摄入冷液（0.41 + -0.16degC）较控制液（0.17 + -0.17degC）直肠温度下降幅度更大（t_6 = -3.47， P = .01）。在运动过程中，摄食5至25分钟的冷液后，直肠温度较低（t_6范围，2.53-3.38，P <=。05）。摄入冷流体后（19.26 + -2.91 km），循环距离大于摄入对照流体后的循环距离（18.72 + -2.59 km; t_6 = -2.80，P = .03）。摄入冷流体（275 + -27 W）后，平均功率输出也比连续输出更大。

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