| Keywords |
ACh ; Sweating ; Iontophoresis ; QSART |
| Abstract |
The sweat volume of indirectly activated (AXR) and directly activated (DIR) of sweating that occurs in the aerobic-trained as compared to the sedentary subjects has been attributed to differences in the peripheral sweating mechanisms, although such mechanisms have not been completely investigated in comparative terms. The aim of this study is to investigate quantitatively the peripheral sudomotor adaptive mechanisms attributed for AXR and DIR sweating that is found in the aerobic-trained tennis athletes in contrast to the sedentary subjects. QSART by 2 mA for 5 min of 10% ACh were applied to determine AXR by nicotinic receptor mediated sweating activity (axon reflex-mediated) and DIR by muscarinic receptor mediated sweating activity sweating during ACh iontophoresis. The sweat onset time of the AXR (1) by nicotinic receptor mediated sweating activity was shorter in the aerobic-trained tennis athletes and the sedentary subjects (P<0.01). The sweat volume of AXR (1), AXR (2) and DIR was higher in the aerobic-trained tennis athletes as compared to the output for the sedentary subjects (P<0.01). Furthermore, number of activated sweat gland density was higher in the aerobic-trained tennis athletes as compared to the output for the sedentary subjects (P<0.001). The activated single sweat gland output was higher in the aerobic-trained tennis athletes as compared to the output for the sedentary subjects (P<0.001). These findings suggest that aerobic-trained tennis athletes had higher sweat outputs due to the combinations of a higher sweat gland output per activated sweat gland, shorter for onset time of AXR, more increased number of activated sweat gland density. |