Exercise Physiology Laboratory, Department of Health, Exercise and Sports Sciences, University of New Mexico, MSC 04 2610, Albuquerque, NM 87131-0001, USA.
Eur J Appl Physiol. 2010 Apr;108(6):1217-23. doi: 10.1007/s00421-009-1335-8. Epub 2009 Dec 24.
This study examined whether palm cooling (PC) could reduce heat strain, measured through changes in core, mean skin, mean body temperatures, and thermal sensation in resting hyperthermic subjects wearing chemical protective garments. Ten male subjects performed three exercise bouts (6.1 km h(-1), 2-4% grade) in a hot, dry environment [mean (SD) air temperature 42.2 (0.5 degrees C), relative humidity 36.5 (1%)] until core temperature reached 38.8 degrees C. Subjects then simulated transport in an armoured vehicle by resting in a seated position for 50 min with either no cooling (NC), (PC at 10 degrees C) or palm cooling with vacuum application around the hand (PCVAC, 10 degrees C, 7.47 kPa negative pressure). Core, skin, and mean body temperatures with PC and PCVAC were lower (P < 0.05) than NC from 15 to 50 min of cooling, and thermal sensation was lower (P < 0.05) from 30 to 50 min, with no differences in any variables between PC and PCVAC. Maximal heat extraction averaged 42 (12 W), and core temperature was reduced by 0.38 (0.21 degrees C) after 50 min of PC. Heat extraction with PC was modest compared to other cooling approaches in the literature.
本研究旨在探讨手掌冷却（PC）是否能降低热应激，通过观察穿着化学防护服的休息性过热受试者的核心温度、平均皮肤温度、平均体温度和热感觉的变化来衡量。10 名男性受试者在炎热干燥的环境中进行了三次运动（6.1 公里/小时，2-4%坡度），直到核心温度达到 38.8 摄氏度。然后，受试者在座位上休息 50 分钟，要么不进行冷却（NC），要么进行手掌冷却（PC，10 摄氏度），要么在手周围使用真空进行手掌冷却（PCVAC，10 摄氏度，7.47kPa 负压），以此模拟装甲车内的运输。与 NC 相比，PC 和 PCVAC 从冷却的第 15 分钟到第 50 分钟，核心、皮肤和平均体温度更低（P<0.05），从第 30 分钟到第 50 分钟，热感觉更低（P<0.05），PC 和 PCVAC 之间在任何变量上均无差异。最大热提取量平均为 42（12W），50 分钟的 PC 后核心温度降低了 0.38（0.21 摄氏度）。与文献中的其他冷却方法相比，PC 的热提取量适中。
