Comparison of Gastrointestinal and Rectal Temperatures During Recovery After a Warm-Weather Road Race

作者：Hosokawa Yuri^*; Adams William M; Stearns Rebecca L; Casa Douglas J

来源：Journal of Athletic Training, 2016, 51(5): 382-388.

DOI：10.4085/1062-6050-51.7.02

• hyperthermia
• body temperature
• temperature measuring devices
• validity

Context: It has been well established that gastrointestinal temperature (T-GI) tracks closely with rectal temperature (T-REC) during exercise. However, the field use of T-GI pills is still being examined, and little is known about how measurements obtained using these devices compare during recovery after exercise in warm weather.
Objective: To compare T-GI and T-REC in runners who completed an 11.3-km warm-weather road race and determine if runners with higher T-GI and T-REC present with greater passive cooling rates during recovery.
Design: Cross-sectional study.
Setting: Field.
Patients or Other Participants: Thirty recreationally active runners (15 men, 15 women; age = 39 +/- 11 years, weight = 68.3 +/- 11.7 kg, body fat = 19.2%+/- 5.0%).
Main Outcome Measure(s): The T-GI and T-REC were obtained immediately after the race and during a 20-minute passive rest at the 2014 Falmouth Road Race (heat index = 26.2 degrees C +/- 0.9 degrees C). Temperatures were taken every 2 minutes during passive rest. The main dependent variables were mean bias and limits of agreement for T-GI and T-REC, using Bland-Altman analysis, and the 20-minute passive cooling rates for T-GI and T-REC.
Results: No differences were evident between T-GI and T-REC throughout passive rest (P = .542). The passive cooling rates for T-GI and T-REC were 0.046 +/- 0.031 degrees C.min(-1) and 0.060 +/- 0.036 degrees C.min(-1), respectively. Runners with higher T-GI and T-REC at the start of cooling had higher cooling rates (R = 0.682, P < .001 and R = 0.54, P = .001, respectively). The mean bias of T-GI during the 20-minute passive rest was -0.06 degrees C +/- 0.56 degrees C with 95% limits of agreement of 61.09 degrees C.
Conclusions: After participants completed a warm-weather road race, T-GI provided a valid measure of body temperature compared with the criterion measure of T-REC. Therefore, T-GI may be a viable option for monitoring post-exercise-induced hyperthermia, if the pill is administered prophylactically.

• 出版日期2016-5