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Research: MIWA and colleagues,
Listed in Issue 93
Abstract
MIWA and colleagues, Department of Autonomic and Behavioral Neurosciences, Division of Higher Nervous Control, Research Institute of Environmental Medicine, Nagoya University, Nagoya, have described the human cardiovascular responses to a 60-minute bath at 40°C.
Background
The study was designed to determine human cardiovascular responses to a 60-minute bath at 40°C compared with a thermoneutral bath at 34.5°C.
Methodology
Mean blood pressure, heart rate, skin blood flow, and core temperature were measured in 8 healthy young men bathing at two different temperatures, 34.5°C and 40°C.
Results
During the thermoneutral bath, heart rate tended to decrease and all other variables showed no significant changes. Ten minutes after entering the hot bath, mean blood pressure decreased while heart rate and skin blood flow increased. At the same time, core temperature increased.
Conclusion
The authors conclude that bathing at 40°C may induce remarkable changes in the cardiovascular system by raising core temperature when the bath lasts for more than 10 minutes.
References
Miwa C, Matsukawa T, Iwase S, Sugiyama Y, Mano T, Sugenoya J, Yamaguchi H, Kirsch KA.. Human cardiovascular responses to a 60-min bath at 40 degrees C. Environmental Medicine 38 (1): 77-80, 1994.
