| Autor: |
Courtney E, Wheelock, Hayden W, Hess, Zachary J, Schlader, Blair Jd, Johnson, David, Hostler |
| Rok vydání: |
2020 |
| Předmět: |
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| Zdroj: |
Underseahyperbaric medicine : journal of the Undersea and Hyperbaric Medical Society, Inc. 47(2) |
| ISSN: |
1066-2936 |
| Popis: |
Cold-water immersion impairs manual dexterity when finger temperature is below 15°C. This exposes divers to increased risk of error. We hypothesized that whole-body active heating would maintain finger temperatures and dexterity during cold-water immersion.Twelve subjects (six males) (22 ± 2 years old; BMI 23.9 ± 2.5; body fat 16 ± 6%) completed 60-minute head-out water immersion (HOWI) wearing a 7mm wetsuit and 3mm gloves in thermoneutral water (TN 25°C) and cold water (CW 10°C) while wearing a water-perfused suit (WP) with 37°C water circulated over the torso, arms, and legs. Gross (Minnesota Manual Dexterity Test [MMDT]) and fine (modified Purdue Pegboard [PPT]) dexterity were assessed before, during and after immersion. Core body and skin temperatures were recorded every 10 minutes.MMDT (TN -25 ± 14%; CW -72 ± 23%; WP -67 ± 29%; p0.05) and PPT (TN -16 ± 9%; CW: -45 ± 10%; WP: -38 ± 13%; p0.05) performance decreased during immersion. MMDT and PPT did not differ between CW and WP. Immediately following immersion gross dexterity was recovered in all conditions. Post-immersion fine dexterity was still impaired in CW (p0.01), but not WP or TN. Core and skin temperatures decreased during immersion in CW and WP (p0.05) but did not differ between CW and WP.Manual dexterity decreased during immersion. Dexterity was further impaired during cold-water immersion and was not maintained by water perfusion active heating. Warm water perfusion did not maintain finger temperature above 15°C but hand temperature remained above these limits, suggesting a need to reassess thermal thresholds for working divers in cold-water conditions. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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