2017/08/01 by Nicholas Ravanelli, Ollie Jay, Daniel Gagnon
paper · doi:10.1152/ajpregu.00033.2017
Some studies have observed a functional relationship between sweating and skin blood flow. However, the implications of this relationship during physiologically relevant conditions remain unclear. We manipulated sudomotor activity through changes in sweating efficiency to determine if parallel changes in vasomotor activity are observed. Eight young men completed two trials at 36°C and two trials at 42°C. During these trials, air temperature remained constant while ambient vapor pressure increased from 1.6 to 5.6 kPa over 2 h. Forced airflow across the skin was used to create conditions of high (HiS eff ) or low (LoS eff ) sweating efficiency. Local sweat rate (LSR), local skin blood flow (SkBF), as well as mean skin and esophageal temperatures were measured continuously. It took longer for LSR to increase during HiS eff at 36°C (HiS eff : 99 ± 11 vs. LoS eff : 77 ± 11 min, P eff : 72 ± 16 vs. LoS eff : 51 ± 15 min, P