In:
Journal of Occupational Health, Wiley, Vol. 64, No. 1 ( 2022-01)
Abstract:
This study examined whether a fan‐attached jacket (FAJ) may mitigate the heat strain in hot or humid environment. Methods Nine healthy men engaged in 60‐min sessions on a bicycle ergometer (4 metabolic equivalents [METs] workload) in hot‐dry (40°C and 30% relative humidity) and warm‐humid (30°C and 85% relative humidity) environments. Both are equivalent to an approximately 29°C wet‐bulb globe temperature. The experiment was repeated—once wearing an ordinal jacket (control condition) and once wearing a long‐sleeve FAJ that transfers ambient air at a flow rate of 12 L/s (FAJ condition)—in both environments. Results Increases in core temperatures in hot‐dry environment were not statistically different between control and FAJ; however, that in the warm‐humid environment were significantly different between control and FAJ (0.96 ± 0.10°C and 0.71 ± 0.11°C in rectal temperature, P 〈 .0001; and 0.94 ± 0.09°C and 0.61 ± 0.09°C in esophageal temperature, P 〈 .0001). Changes in heart rate were different between control and FAJ in both environments (62 ± 3 bpm and 47 ± 7 bpm, P 〈 .0001 in hot‐dry environment; and 61 ± 3 bpm and 46 ± 5 bpm, P 〈 .0001 in the warm‐humid environment) and decrease of %weight change was different in hot‐dry environment (1.59 ± 0.12% and 1.25 ± 0.05%, P = .0039), but not in the warm‐humid environment. Conclusions Wearing a FAJ may mitigate heat strain both in hot or humid environments.
Type of Medium:
Online Resource
ISSN:
1341-9145
,
1348-9585
DOI:
10.1002/1348-9585.12323
Language:
English
Publisher:
Wiley
Publication Date:
2022
detail.hit.zdb_id:
1340985-2
detail.hit.zdb_id:
2075956-3
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