Thermal Ergonomics Laboratory, School of Human Kinetics, University of Ottawa, 200 Lees Avenue, Ottawa, ON, K1N 6N5, Canada.
Eur J Appl Physiol. 2011 Aug;111(8):1599-607. doi: 10.1007/s00421-010-1788-9. Epub 2010 Dec 29.
It has been previously demonstrated that the individual variation in whole-body sweat rate is described by differences in each participant's heat balance status. It was hypothesized that the individual variation in local sweat rate of the forehead (LSR(head)) and forearm (LSR(arm)) would be similarly described using a whole-body heat balance approach, specifically the ratio of evaporation required for heat balance relative to the maximum evaporation possible (i.e. E (req):E (max)). Twelve males cycled at 60% [Formula: see text] for 60 min at 24.9 ± 0.5°C, 31 ± 14% relative humidity. Rectal (T (re)) and aural canal (T (au)) temperatures as well as mean skin temperature ([Formula: see text]), metabolic energy expenditure (M) and rate of external work (W) were measured throughout. In addition, whole-body sweat rate at steady state (WBSR(ss)) was estimated using the change in body mass over the last 15 min of exercise, with LSR(head) and LSR(arm) estimated using technical absorbent patches applied between the 50th and 55th minute. WBSR(ss) significantly correlated with M-W (r = 0.66, P = 0.021), E (req) (r = 0.69, P = 0.013) and E (req):E (max) (r = 0.87, P < 0.001); LSR(head) was significantly correlated with E (req):E (max) (r = 0.82, P = 0.001), but not M-W (r = 0.31, P = 0.328) or E (req) (r = 0.38, P = 0.227); and LSR(arm) significantly correlated with E (req) (r = 0.62, P = 0.031) and E (req):E (max) (r = 0.78, P = 0.003) but not M-W (r = 0.56, P = 0.059). None of WBSR(ss), LSR(head) or LSR(arm) significantly correlated with any variations in T (re), T (au) or [Formula: see text] (i.e. 0.8T (re) + 0.2[Formula: see text]). Secondary analyses also demonstrated that both LSR(head) (r = 0.79, P = 0.002) and LSR(arm) (r = 0.89, P < 0.001) correlated with WBSR(ss). In conclusion, the individual variation in WBSR(ss), LSR(head) and LSR(arm) is described by the ratio of E (req) relative to E (max).
先前的研究表明，全身排汗率的个体差异可以通过每个参与者的热平衡状态的差异来描述。研究假设，额部（LSR(head)）和前臂（LSR(arm)）局部排汗率的个体差异也可以通过全身热平衡方法来描述，具体来说，是通过相对于最大可能蒸发量的蒸发量比值（即 E(req):E(max)）来描述。12 名男性以 60% [Formula: see text]的强度在 24.9 ± 0.5°C、31 ± 14%相对湿度的环境中进行了 60 分钟的自行车运动。在整个运动过程中，测量了直肠（T(re)）和耳道（T(au)）温度以及平均皮肤温度 ([Formula: see text])、代谢能量消耗 (M) 和外部功输出 (W)。此外，通过运动最后 15 分钟的体重变化来估计稳态下的全身排汗率（WBSR(ss)），并在第 50 至 55 分钟之间使用技术吸收垫来估计 LSR(head)和 LSR(arm)。WBSR(ss)与 M-W 显著相关（r=0.66，P=0.021）、E(req)（r=0.69，P=0.013）和 E(req):E(max)（r=0.87，P<0.001）；LSR(head)与 E(req):E(max) 显著相关（r=0.82，P=0.001），但与 M-W 不相关（r=0.31，P=0.328）或 E(req)（r=0.38，P=0.227）；LSR(arm)与 E(req)和 E(req):E(max)显著相关（r=0.62，P=0.031 和 r=0.78，P=0.003），但与 M-W 不相关（r=0.56，P=0.059）。WBSR(ss)、LSR(head)或 LSR(arm)与 T(re)、T(au)或 [Formula: see text]的任何变化均无显著相关性（即 0.8T(re)+0.2[Formula: see text]）。次要分析还表明，LSR(head)（r=0.79，P=0.002）和 LSR(arm)（r=0.89，P<0.001）与 WBSR(ss)均显著相关。总之，WBSR(ss)、LSR(head)和 LSR(arm)的个体差异可以通过 E(req)与 E(max)的比值来描述。
