皮质醇对力竭运动的峰值反应：采血时间表的影响。
PEAK CORTISOL RESPONSE TO EXHAUSTING EXERCISE: EFFECT OF BLOOD SAMPLING SCHEDULE.
作者信息
Daly W, Seegers C, Timmerman S, Hackney A C
机构信息
Endocrine Section - Applied Physiology Laboratory, University of North Carolina, Chapel Hill, North Carolina, USA.
出版信息
Med Sportiva (Krakow Engl Ed). 2004;8(1):17-20.
INTRODUCTION
Strenuous exercise provokes increases in circulating cortisol levels. When the peak cortisol response to exercise occurs is a point of contention, as some research suggests the peak response coincides with the end of exercise while other indicate it is delayed and occurs during recovery.
AIM OF THE STUDY
This study examined when peak cortisol levels occur in response to intensive, exhausting exercise of a prolonged nature.
METHODS
Thirty-four healthy male subjects ran on a treadmill until volitional exhaustion. Blood specimens were analyzed for cortisol levels immediately at the end of exercise and at 30, 60, and 90 minutes into recovery.
RESULTS
A significantly greater number (25/34; i.e., 73.5%) of the peak cortisol responses occurred during the recovery period (at 30 - 90 minutes) after the subjects reached volitional exhaustion and had stopped exercising.
CONCLUSION
The findings suggest that if researchers are interested in assessing the peak cortisol response to exhausting exercise they should continue blood sampling for approximately 1 hour into the recovery period.
引言
剧烈运动会促使循环皮质醇水平升高。运动时皮质醇反应的峰值何时出现存在争议，一些研究表明峰值反应与运动结束同时出现，而另一些研究则表明峰值反应会延迟并在恢复过程中出现。
研究目的
本研究旨在探讨在长时间高强度、使人精疲力竭的运动中，皮质醇水平的峰值何时出现。
方法
34名健康男性受试者在跑步机上跑步直至自愿力竭。在运动结束时以及恢复的30、60和90分钟时，立即对血样进行皮质醇水平分析。
结果
在受试者达到自愿力竭并停止运动后的恢复期间（30 - 90分钟），出现皮质醇峰值反应的人数显著更多（25/34；即73.5%）。
结论
研究结果表明，如果研究人员有兴趣评估力竭运动时的皮质醇峰值反应，他们应该在恢复期间持续采血约1小时。
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