Sweat gland response to exercise in the heat among pre-, mid-, and late-pubertal boys.
Sweat gland response to exercise in the heat among pre-, mid-, and late-pubertal boys.
复制标题
青春期前、中期和晚期男孩的汗腺对高温运动的反应。
DOI：
10.1249/00005768-199203000-00006
复制
发表时间：
1992
影响因子：
4.1
通讯作者：
J. Macdougall
中科院分区：
文献类型：
--
作者：
Bareket Falk;Oded Bar;R. Calvert;J. Macdougall
男生出汗率（SR）低于男生。为了评估个体汗腺的反应与身体生长和成熟之间的关联，三组青春期男孩在气候室（42摄氏度，20%相对湿度）中以50%VO2max骑自行车。根据坦纳分期（阴毛），16例被分类为青春期前（PP，坦纳1），15例为青春期中期（MP，坦纳2-4），5例为青春期晚期（LP，坦纳5）。通过皮肤摄影和计算机辅助成像分析测量热激活汗腺的群体密度（PD）、平均汗滴面积（DA）和汗液覆盖的皮肤比例（%A）。其他测量包括直肠和皮肤温度（分别为Tre，Tsk），心率（HR）和全身SR。HR，Tre和Tsk的升高在各组之间没有差异。LP组的全身SR显著高于PP组（PP = 4.95 +/- 0.23，MP = 5.79 +/- 0.20，LP = 6.70 +/- 0.42 ml.min-1.m-2）（平均值+/- SEM）。PP组的PD显著较高（PP = 128 +/- 8，MP = 97 +/- 9，LP = 74 +/- 9腺体.cm-2），而LP组的DA较高（PP = 5.47 +/- 0.59，MP = 6.92 +/- 0.47，LP = 12.83 +/- 1.41 microns2.10（4））。%A在各组之间没有差异。LP组中计算的每个腺体的SR高于不太成熟的组（PP = 4.6 +/- 0.3，MP = 7.2 +/- 0.8，LP = 9.6 +/- 1.0 nl.min-1）。（250字处删节）
Sweating rate (SR) of boys is lower than that of men. To assess the association between the response of individual sweat glands and physical growth and maturation, three groups of circumpubertal boys cycled at 50% VO2max in a climatic chamber (42 degrees C, 20% relative humidity). Based on Tanner staging (pubic hair), 16 were classified as prepubertal (PP, Tanner 1), 15 as midpubertal (MP, Tanner 2-4), and five as late-pubertal (LP, Tanner 5). Population density (PD) of the heat-activated sweat glands, the mean area of sweat drops (DA), and the proportion of skin covered by sweat (%A) were measured by skin photography and computer-assisted imaging analysis. Other measurements included rectal and skin temperatures (Tre, Tsk, respectively), heart rate (HR), and total body SR. The rise in HR, Tre and Tsk did not differ among groups. Whole body SR was significantly higher in the LP group compared with PP (PP = 4.95 +/- 0.23, MP = 5.79 +/- 0.20, LP = 6.70 +/- 0.42 ml.min-1.m-2) (mean +/- SEM). PD was significantly higher in the PP group (PP = 128 +/- 8, MP = 97 +/- 9, LP = 74 +/- 9 glands.cm-2), while DA was higher in the LP group (PP = 5.47 +/- 0.59, MP = 6.92 +/- 0.47, LP = 12.83 +/- 1.41 microns2.10(4)). %A did not differ among groups. The calculated SR per gland was higher among the LP groups compared with the less mature ones (PP = 4.6 +/- 0.3, MP = 7.2 +/- 0.8, LP = 9.6 +/- 1.0 nl.min-1).(ABSTRACT TRUNCATED AT 250 WORDS)