A non-invasive device to continuously determine heat strain in humans

摘要: Abstract Heat stroke remains a very dangerous, potentially lethal illness in humans. The Physiological Strain Index (PSI), originally based on heart rate and rectal temperature recordings humans, describes heat strain quantitative terms. objective of our study was to establish whether the serving determine PSI could be replaced by non-invasive skin sensor combined with flux (Double Sensor) attached inside helmet. We assumed (i) that difference between device under test should less than ±1.0 °C for ±2 S.D. at 10, 25, 40 °C ambient temperature, (ii) predictions Double Sensor differ 1 score from calculations temperature. Twenty male subjects participated study. Rectal, nasopharyngeal, temperatures, flux, cardiovascular data were collected continuously during different experimental setups temperatures 40 °C. Depending protocols, exercise intensities varied 25% 55% individual VO2max. A comparison obtained those revealed differed −0.16 0.1 °C mean concordance correlation coefficients (CCC) all work rest periods rose rising (all periods: 10 °C: 0.49; 25 °C: 0.69; 40 °C: 0.75; 0.39; 0.81; 0.74), (iii) helmet showed conditions, dropped much more quickly what recorded when taking (p