Telemetry pill versus rectal and esophageal temperature during extreme rates of exercise-induced core temperature change
article
Core temperature measurement with an ingestible telemetry pill has been scarcely investigated during extreme rates of temperature change, induced by short high-intensity exercise in the heat. Therefore, nine participants performed a protocol of rest, (sub)maximal cycling and recovery at 30 °C. The pill temperature (T pill) was compared with the rectal temperature (T re) and esophageal temperature (T es). T pillcorresponded well to T reduring the entire trial, but deviated considerably from T esduring the exercise and recovery periods. During maximal exercise, the average ΔT pillT reand ΔT pillT eswere 0.13 ± 0.26 and0.57 ± 0.53 °C, respectively. The response time from the start of exercise, the rate of change during exercise and the peak temperature were similar for T pilland T re.T esresponded 5 min earlier, increased more than twice as fast and its peak value was 0.42 ± 0.46 °C higher than T pill. In conclusion, also during considerable temperature changes at a very high rate, T pillis still a representative of T re. The extent of the deviation in the pattern and peak values between T pilland T es(up to >1 °C) strengthens the assumption that T pillis unsuited to evaluate central blood temperature when body temperatures change rapidly. © 2012 Institute of Physics and Engineering in Medicine.
TNO Identifier
460440
ISSN
09673334
Source
Physiological Measurement, 33(6), pp. 915-924.
Pages
915-924
Files
To receive the publication files, please send an e-mail request to TNO Repository.