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Estimated and measured core temperature responses to high-intensity warm weather military training: implications for exertional heat illness risk assessment
- Source :
- Physiological measurement. 41(6)
- Publication Year :
- 2020
-
Abstract
- Objective: Humans avoid overheating through physiological and behavioral mechanisms. However, elite athletes, industrial workers, and military personnel, driven by the tasks at hand, may choose to continue working and face an increased risk of exertional heat illness (EHI). We wanted to examine the efficacy of a new core temperature (Tcr) estimation algorithm in assessing EHI risk. Approach: Physiological responses of 21 male Royal Marines recruits (age 21±2 y, height 1.79±0.05 m, weight 80.5±7.2 kg) were collected during a physically-demanding criterion road march (14.5 km in 90 min with a 9.6 kg load; air temperature 16°C, relative humidity ≥ 84%). Measured Tcr (thermometer pill) and estimated Tcr (ECTempTM Tcr-est) were compared. Main Results: Measured Tcr either increased to an asymptote Tcr 40.0°C (HOT; n=10). In the HOT group, Tcr-est reflected measured Tcr up to Tcr = 40.0°C (Bias = −0.10 ± 0.37°C, root mean square error = 0.37 ± 0.13°C). In the WARM group, Tcr-est overestimated Tcr (Bias = 0.34 ± 0.40°C) and was higher from mid-point to end. A logistic regression (Skin temperature approximate entropy and mean heart rate) was able to predict group membership (95% accuracy) at 20 minutes, allowing a WARM group ECTemp(TM) correction factor (corrected Bias=0.00 ± 0.29°C). Significance: The Tcr-est successfully tracked Tcr in the HOT group with high risk of exertional heat illness (EHI) (40% incidence). Skin temperature complexity shows promise as a non-invasive means of insight into the state of thermoregulatory control mechanisms.
- Subjects :
- Adult
Male
medicine.medical_specialty
Hot Temperature
Physiology
0206 medical engineering
Biomedical Engineering
Biophysics
02 engineering and technology
Core temperature
Logistic regression
Heat Stress Disorders
Risk Assessment
Body Temperature
03 medical and health sciences
Young Adult
0302 clinical medicine
Heat illness
Heart Rate
Physiology (medical)
Internal medicine
Heart rate
medicine
Humans
Relative humidity
Weather
business.industry
High intensity
medicine.disease
020601 biomedical engineering
Physiological responses
Military Personnel
Cardiology
business
Risk assessment
Skin Temperature
030217 neurology & neurosurgery
Algorithms
Body Temperature Regulation
Subjects
Details
- ISSN :
- 13616579
- Volume :
- 41
- Issue :
- 6
- Database :
- OpenAIRE
- Journal :
- Physiological measurement
- Accession number :
- edsair.doi.dedup.....fa783631097cb961f0639ad03441b8b1