Machado-Moreira Christiano A, Smith Foske M, van den Heuvel Anne M J, Mekjavic Igor B, Taylor Nigel A S
School of Health Sciences, University of Wollongong, Wollongong, NSW, 2522, Australia.
Eur J Appl Physiol. 2008 Sep;104(2):265-70. doi: 10.1007/s00421-007-0646-x. Epub 2007 Dec 20.
Thermal sweating from the human torso accounts for about half of the whole-body sweat secretion, yet its intra-segmental distribution has not been thoroughly examined. Therefore, the aim of the current study was to provide a detailed description of the distribution of eccrine sweating within the torso during passively-induced (water-perfusion garment: 40 degrees C) and progressively increasing, exercise-related thermal strain (36 degrees C, 60% relative humidity). Sudomotor function was measured in ten males using ventilated sweat capsules (3.16 cm(2)) attached to twelve sites on the ventral (four), lateral (three) and dorsal (four) torso, and upper shoulder surfaces. Sweating increased asymptotically in all sites, with the final core temperature averaging 39.7 degrees C (+/-0.1) and heart rates being 181 b min(-1) (+/-2). During exercise, the mean torso sweat rate averaged 1.35 mgcm(-2)min(-1), with sweating from the lateral torso surfaces generally being the lowest. Each of the between-site comparisons with the lateral torso differed significantly (P < 0.05), except for comparisons with the chest (P = 0.051) and shoulder (P > 0.05). The intra-segmental differences between the lateral torso and the chest, abdomen, upper- and lower-back areas were significantly accentuated during exercise. From these data, it is evident that the torso is another region that does not have a uniform distribution of thermally-induced sweating. Thus, it is no longer acceptable for researchers, modellers, sweating manikins engineers or clothing manufacturers to assume that the sweat rates for all local sites within any body segment are equivalent.
人体躯干的温热性出汗约占全身汗液分泌的一半，但其中节段内分布尚未得到充分研究。因此，本研究的目的是详细描述在被动诱导（水灌注衣：40摄氏度）和逐渐增加的、与运动相关的热应激（36摄氏度，60%相对湿度）过程中躯干内小汗腺出汗的分布情况。使用通风式汗液胶囊（3.16平方厘米）测量了10名男性的发汗功能，这些胶囊附着在躯干腹侧（4个部位）、外侧（3个部位）、背侧（4个部位）以及上肩部表面的12个部位。所有部位的出汗量均呈渐近增加，最终核心温度平均为39.7摄氏度（±0.1），心率为181次/分钟（±2）。运动期间，躯干平均出汗率为1.35毫克/平方厘米·分钟，躯干外侧表面的出汗量通常最低。除了与胸部（P = 0.051）和肩部（P > 0.05）的比较外，与躯干外侧的各部位间比较均有显著差异（P < 0.05）。运动期间，躯干外侧与胸部、腹部、上背部和下背部区域之间的节段内差异显著加剧。从这些数据可以明显看出，躯干是另一个热诱导出汗分布不均的区域。因此，研究人员、建模人员、出汗人体模型工程师或服装制造商再假设身体任何节段内所有局部部位的出汗率相等就不再可行了。
