New portable device for continuous measurement of sweat rate under heat stress during field tests
New portable device for continuous measurement of sweat rate under heat stress during field tests
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新型便携式设备，用于在现场测试期间连续测量热应激下的出汗率
DOI：
10.1152/japplphysiol.00155.2021
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发表时间：
2022
期刊：
影响因子：
3.3
通讯作者：
and Masuki S
中科院分区：
文献类型：
--
作者：
Uchida K;Ogawa Y;Kataoka Y;Manabe K;Aida T;Kamijo YI;Takahashi S;Ikefuchi R;Nose H;and Masuki S
我们开发了一种便携式方法来测量田间试验期间热应激下的出汗率(SR)。将15名男性和17名女性(23~78岁)随机分为方程式组(EG)和验证组(VG)，方程式组(EG)用便携式方法确定SR单位(MmHg2)换算成通气法单位SR(mg·min−1·cm−2)，另一组用验证组(VG)进行验证。由于我们在三个受试者中重复了两次测量，我们将两个测量随机分配到两组中的一组，并分别分析了18名和17名受试者的EG和VG结果。受试者在温暖的环境中以中等强度骑车20min，同时用装有4.8g硅胶和两个微风扇(8.4cm3体积)的胶囊和另一个胶囊(12.6cm2面积)，在1.5min L·−1的干燥空气中测定胸部SR。由于便携式方法增加SR的食道温度(TES)阈值和给定Tesby增加时SR的斜率(X)与通气法(Y)在两组中均高度一致(均P<；0.88；P<；0.001)，在合并两组数据后，我们确定了所有受试者的回归方程：Y=1.11x−3.99Andy=1.05x+0.01时，95%的预测下限分别为±0.12°C和±0.43 mg·min−1·cm−2·°C−1，最小均值差分别在36.2°C~37.2°C和0.2~2.4 mg·min−1·cm−2·°C−1范围内。基于这些发现，我们认为便携式设备在野外测试中评估个人出汗量是足够可靠的。NEW&NOTEWORTHY我们开发了一种便携式设备，用于在野外测试期间连续测量热应激下的汗率，其精度与通风方法获得的精度相似，该方法已用于评估实验室测试中的个人汗率反应。这种新的便携式设备将提供更多的机会，在现场测试期间确定影响更多受试者出汗率的因素。
We have developed a portable method to measure sweat rate (SR) under heat stress during field tests. We randomly divided 15 males and 17 females (23–78 yr) into a group, equation group (EG) to determine an equation to convert a unit of SR (mmHg) by the portable method to that (mg·min−1·cm−2) by the ventilation method, and another group, validation group (VG) to validate the equation. Since we repeated measurements twice in three subjects, we randomly assigned the two measurements to one of the two groups and analyzed the results in 18 and 17 subjects for EG and VG, respectively. Subjects cycled for 20 min at moderate intensity in a warm environment while chest SR was simultaneously measured with a capsule installed with 4.8 g of silica gel and two microfans (8.4 cm3volume) and with another capsule (12.6 cm2area) ventilated with dry air at 1.5 L·min−1. Since the esophageal temperature (Tes) threshold for increasing SR and the slope of SR at a given increase in Tesby the portable method (x) were in high agreement with those values obtained by the ventilation method (y) in both groups (allr> 0.88,P< 0.001), we determined regression equations for all subjects after pooling data from both groups:y= 1.11x− 3.99 andy= 1.05x+ 0.01 when the 95% prediction limits were ±0.12°C and ±0.43 mg·min−1·cm−2·°C−1with minimum mean differences over the range of 36.2°C–37.2°C and 0.2–2.4 mg·min−1·cm−2·°C−1, respectively, using Bland–Altman analysis. Based on these findings, we consider the portable device to be reliable enough to evaluate individual sweating capacity during field tests.NEW & NOTEWORTHYWe developed a portable device to measure sweat rate continuously under heat stress during field tests, with precision similar to that obtained by the ventilation method, which has been used to evaluate individual sweat rate responses in laboratory tests. This new, portable device will provide more opportunities to determine factors influencing sweat rate in larger populations of subjects during field tests.