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| Comparison of insulation provided by dry or wetsuits among recreational divers during cold water immersion (< 5°C) Lafère, P.; Guerrero, F.; Germonpré, P.; Balestra, C. (2021). Comparison of insulation provided by dry or wetsuits among recreational divers during cold water immersion (< 5°C). Int. Marit. Health 72(3): 217-222. https://dx.doi.org/10.5603/imh.2021.0040
In: International Maritime Health. Interfaculty Institute of Maritime and Tropical Medicine in Gdynia: Gdansk. ISSN 0324-8542; e-ISSN 2081-3252
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| Abstract |
Materials and methods: Two different groups of divers wearing either a wetsuit (n = 15) or a dry suit (n = 15) volunteered for this study. Anthropometric data and dive experience were recorded; skin temperatures at the cervical-supraclavicular (C-SC) area and hands were assessed through high-resolution thermal infrared imaging taken pre- and post-dive. Results: As far as anthropometrics, pre-dive C-SC temperatures (37.0 ± 0.4°C), depth (dry: 43 ± 4.6 mfw vs. wet: 40.3 ± 4.0 mfw) and water temperature exposure (4.3°C) are concerned, both groups were comparable. Total dive time was slightly longer for dry suit divers (39.6 ± 4.0 min vs. 36.5 ± 4.1 min, p = 0.049). Post-dive, C-SC temperature was increased in dry suit divers by 0.6 ± 0.6°C, and significantly decreased in wetsuit divers by 0.8 ± 0.6°C. The difference between groups was highly significant (dry: 37.5 ± 0.7°C vs. wet: 36.2 ± 0.7°C, p = 0.004). Hand’s temperature decreased significantly in both groups (dry: 30.3 ± 1.2°C vs. wet: 29.8 ± 0.8°C, p = 0.33). Difference between groups was not significant. Conclusions: Medium-duration immersion in cold water (< 5°C), of healthy and fully protected subjects was well tolerated. It was demonstrated that proper insulation based on a three-layer strategy allows maintaining or even slightly improve thermal balance. However, from an operational point of view, skin extremities are not preserved. |
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