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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.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| High heat strain | Experimental | participants exercised at 75% of their heart rate maximum (HR max) and wore light athletic clothing (t-shirt and shorts) |
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| Low heat strain | Experimental | participants exercised at 50% HR max, wearing protective firefighter clothing (jacket and trousers) |
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Heat strain | Other | 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. |
| Measure | Description | Time Frame |
|---|---|---|
| Core body temperature | Rectal core body temperature (unit of measure is degree celsius °C) | 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) | 90 minutes |
| ECG-based heat strain index | ECG-based index of heat strain derived from heart rate variability | 90 minutes |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Simon Annaheim, Dr. | Empa, Swiss Federal Laboratories for Materials Science and Technology | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Empa | Sankt Gallen | Canton of St. Gallen | 9014 | Switzerland |
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| Label | URL |
|---|---|
| Published manuscript | View source |
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Data is available upon request from qualified researchers.
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| ID | Term |
|---|---|
| D018882 | Heat Stress Disorders |
| ID | Term |
|---|---|
| D014947 | Wounds and Injuries |
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