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- W2473380500 abstract "Core body temperature (Tco) is a central measure of thermoregulation. Traditional Tco thermometry, (e.g. rectal, esophageal) is accurate, but invasive and not practical in the field. A currently-developed, chest-strap physiological monitoring device offers real-time Tco estimation, using the Kalman filter algorithm, which is constructed from a large set of ambulatory heart rate (HR) data. This device can be used to track transient Tco changes and assess thermal status in athletes and workers (e.g. firefighters) performing work in the heat. PURPOSE: To determine the accuracy of HR-based Tco estimation using a wearable physiological monitoring device compared to rectal thermometry (Tre) during active and passive heat stress. METHODS: Ten healthy males (23 ± 1years, 77.5 ± 9.9kg, 182 ± 0.1cm, 56.9 ± 5.9 ml/kg/min VO2max ) completed three heat stress conditions: passive heat (PH) (45°C, RH 50%) while wearing a liquid-warming garment (45°C); continuous treadmill exercise (TE) at ∼50% VO2max, (35°C, RH 50%); and continuous cycling exercise (CE) at ∼50% VO2max, 60-70 RPM (45°C, RH 50%). Tre and estimated Tco were compared at four time points: at baseline, and 0.5, 1.0, 1.5°C increase in Tre. RESULTS:Table: No title available.CONCLUSION: Estimated Tco was reasonably accurate for CE and TE when Tre elevated beyond 0.5°C, and for PH when Tre elevated up to 0.5°C above baseline. The increased HR due to increased metabolic demand at the onset of exercise may explain the over-estimation of Tco up to 0.5°C during both CE and TE; while, the underestimation of Tco beyond 0.5°C in PH resulted from a smaller increase in HR. Algorithm modifications in determining metabolic demands and HR responses to various heat stress conditions would improve the accuracy of this wearable monitoring device in the field." @default.
- W2473380500 created "2016-07-22" @default.
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- W2473380500 date "2015-05-01" @default.
- W2473380500 modified "2023-09-27" @default.
- W2473380500 title "Accuracy of Heart Rate-Based Core Body Temperature Estimation Using a Wearable Physiological Monitoring Device" @default.
- W2473380500 doi "https://doi.org/10.1249/01.mss.0000477049.66834.c3" @default.
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