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- W2938293852 abstract "The heart rate thermal component (ΔHRT) can increase with body heat accumulation and lead to work metabolism (WM) overestimation. We used two methods (VOGT and KAMP) to assess ΔHRT of 35 forest workers throughout their work shifts, then compared ΔHRT at work and at rest using limits of agreement (LoA). Next, for a subsample of 20 forest workers, we produced corrected WM estimates from ΔHRT and compared them to measured WM. Although both methods produced significantly different ΔHRT time-related profiles, they yielded comparable average thermal cardiac reactivity (VOGT: 24.8 bpm °C−1; KAMP: 24.5 bpm °C−1), average ΔHRT (LoA: 0.7 ± 11.2 bpm) and average WM estimates (LoA: 0.2 ± 3.4 ml O2 kg−1min−1 for VOGT, and 0.0 ± 5.4 ml O2 kg−1min−1 for KAMP). Both methods are suitable to assess heat stress through ΔHRT and improve WM estimation.Practitioner summary: We compared two methods for assessing the heart rate thermal component (ΔHRT), which is needed to produce a corrected HR profile for estimating work metabolism (WM). Both methods yielded similar ΔHRT estimates that allowed accurate estimations of heat stress and WM at the group level, but they were imprecise at the individual level.Abbreviations: AIC: akaike information criterion; bpm: beats per minute; CI: confidence intervals; CV: coefficient of variation in %; CV drift: cardiovascular drift; ΔHRT: the heart rate thermal component in bpm; ΔHRT: the heart rate thermal component in bpm; ΔΔHRT: variation in the heart rate thermal component in bpm; ΔTC: variation in core body temperature in °C; HR: heart rate in bpm; HRmax: maximal heart rate in bpm; Icl: cloting insulation in clo; KAMP: Kampmann et al. (2001) method to determe ΔHRT; LoA: Limits of Agreement; PMV-PPD: the Predicted Mean Vote and Predicted Percentage Dissatisfied; PHS: Predicted Heat Strain model; RCM: random coefficients model; SD: standard deviation; TC: core body temperature in °C; TCR: thermal cardiac reactivity in bpm °C−1; τΔHRT: rate of change in the heart rate thermal component in bpm min−1; τTC: rate of change in core body temperature in °C min−1; tα,n-1: Student’s t statistic with level of confidence alpha and n−1 degrees of freedom; TWL: Thermal Work Limit model; V̇O2: oxygen consumption in ml O2 kg−1 min−1; V̇O2 max: maximal oxygen consumption in ml O2 kg−1 min−1; VOGT: Vogt et al. (1973) method to determine ΔHRT; WBGT: Wet-Bulb Globe Temperature in °C; WM: work metabolism" @default.
- W2938293852 created "2019-04-25" @default.
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- W2938293852 date "2019-04-09" @default.
- W2938293852 modified "2023-10-03" @default.
- W2938293852 title "Worker heat stress prevention and work metabolism estimation: comparing two assessment methods of the heart rate thermal component" @default.
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- W2938293852 doi "https://doi.org/10.1080/00140139.2019.1588386" @default.
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