Morris Chris, Atkinson Greg, Drust Barry, Marrin Kelly, Gregson Warren
Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, UK.
Chronobiol Int. 2009 Apr;26(3):560-75. doi: 10.1080/07420520902885981.
Chronobiological investigations into core temperature during and after exercise can involve ambulatory measurements of intestinal temperature during actual competitions, esophageal temperature measurements in laboratory simulations, or rectal temperature, which can be measured in both the field and laboratory. These sites have yet to be compared during both morning and afternoon exercise and subsequent recovery. At 08:00 and 17:00 h, seven recreationally active males exercised at 70% peak oxygen uptake for 30 min and then recovered passively for 30 min. During the experiment, esophageal, rectal, intestinal, and skin temperatures, plus sweat loss, heart rate, and ratings of perceived exertion (RPE), were monitored. We found that the diurnal variation in intestinal temperature responses (0.45+/-0.32 degrees C; mean+/-SD) was significantly larger compared with rectal (0.33+/-0.24 degrees C) and, particularly, esophageal temperature responses (0.21+/-0.20 degrees C; p= 0.019). This reflected a greater difference of 0.25-0.40 degrees C between the esophagus and the other two sites in the afternoon, compared to inter-site differences of only 0.13-0.16 degrees C in the morning. Diurnal variation was small for skin temperature, heart rate, sweat loss, and RPE responses during exercise (p>0.05). Our data suggest that the relative differences between intestinal, rectal, and esophageal temperature during exercise and subsequent recovery depend on time of day to the extent that inferences from studies on experimental and applied chronobiology will be affected.
对运动期间及运动后核心体温进行的生物钟学研究，可能涉及在实际比赛中对肠道温度进行动态测量、在实验室模拟中测量食管温度，或在现场和实验室均可测量的直肠温度。目前尚未对这些部位在上午和下午运动及随后恢复过程中的情况进行比较。在上午8点和下午5点，7名有运动习惯的男性以70%的峰值摄氧量运动30分钟，然后被动恢复30分钟。在实验过程中，监测食管、直肠、肠道和皮肤温度，以及出汗量、心率和主观用力程度分级（RPE）。我们发现，肠道温度反应的昼夜变化（0.45±0.32℃；平均值±标准差）显著大于直肠温度反应（0.33±0.24℃），尤其是食管温度反应（0.21±0.20℃；p = 0.019）。这反映出下午食管与其他两个部位之间的差异为0.25 - 0.40℃，大于上午仅为0.13 - 0.16℃的部位间差异。运动期间皮肤温度、心率、出汗量和RPE反应的昼夜变化较小（p>0.05）。我们的数据表明，运动及随后恢复过程中肠道、直肠和食管温度之间的相对差异取决于一天中的时间，以至于实验和应用生物钟学研究的推断会受到影响。
