This is primarily an experimental study investigating methods of temperature measurement / heat strain detection. In the calibration study, there are different skin temperature sensor types, and in the prediction study there are different methods for determining heat strain, including conventional methods (rectal, gastro-intestinal), the development of a prediction model, and an index based on heart rate variability.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
SCREENING
Masking
NONE
Enrollment
13
The experimental procedure comprised 15 min baseline seated rest (23.2 ± 0.3°C, 24.5 ± 1.6% relative humidity), followed by 15 min seated rest and cycling in a climatic chamber (35.4 ± 0.2◦C, 56.5 ± 3.9% relative humidity; to +1.5◦C or maximally 38.5°C rectal temperature, duration 20-60 min), with a final 30 min seated rest outside the chamber.
Empa
Sankt Gallen, Canton of St. Gallen, Switzerland
Core body temperature
Rectal core body temperature (unit of measure is degree celsius °C)
Time frame: 90 minutes
Predicted core body temperature
Estimated core body temperature (°C) from selected non-invasive measurements: applying a multiple linear regression model several predictive parameters, including skin temperature at different body sites, heat flux at different body sites, and heart rate will be combined to achieve one reported temperature value (°C)
Time frame: 90 minutes
ECG-based heat strain index
ECG-based index of heat strain derived from heart rate variability
Time frame: 90 minutes
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