To compare the effectiveness of the rapid thermal exchange device (RTX) in slowing the development of hyperthermia and associated symptoms among hand immersed in water bath (WB), water-perfused vest (WPV), and no cooling condition (NC). Ten subjects performed 4 heat stress trials. The protocol consisted of 2 bouts of treadmill walking, separated by a cooling-rehydration period. The times to reach the predetermined rectal temperature in the first (38.5 °C) and second bouts (39 °C) were not different among RTX, NC, and WB, but was longer for the WPV in both bouts (p < 0.05). Heat storage was significantly lower for WPV only in the first bout vs. the other conditions (p < 0.05). Heart rate (HR) was not different at 10, 20, and 30 min during the first bout among RTX, NC, and WB, but was lower for WPV (p < 0.05). HR was not different among conditions during the second bout. The RTX was not effective in slowing the development of hyperthermia.
Amorium, F. T., Yamada, P. M., Robergs, R., & Schneider, S. M. (2010). Palm cooling does not reduce heat strain during exercise in a hot, dry environment. Applied Physiology, Nutrition and Metabolism, 35(4), 480-489. https://doi.org/10.1139/H10-040