Abstract
Effects of pressure exerted on the skin by elastic cord on the core temperature, body weight loss and salivary secretion rate were studied under conditions of ambient temperature of 35°C and a relative humidity of 60%. Twelve healthy females, aged 18–23 years, served as subjects. The subjects entered a bioclimatic chamber and rested quietly in a chair for 80 min. Then, skin pressure was exerted by applying elastic cord (8.5 mm wide) to six different skin areas, such as axilla, under-bust, waist, inguines, thighs and ankles. The values of skin pressure by elastic cord ranged from 11.9 to 33.3 g/cm2. In the control experiment, wrapping with an elastic cord was loosely performed without any skin pressure. Rectal and skin temperatures, body weight loss by sweating and salivary secretion rate were measured throughout the 160 min experimental period. Core temperature increased more significantly under pressure exerted on the skin. Body weight loss by mainly sweating and salivary secretion rate were significantly suppressed under pressure exerted on the skin. We discussed the physiological mechanisms in terms of suppression of central nervous activity as to why significant increase of core temperatures, inhibition of body weight loss mainly by sweating and of salivary secretion rate occurred, and furthermore practical significance of these findings for impairment of digestion, swallowing, vocalizing, defense against disease bacteria and sport activity.
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Acknowledgement
The authors thank Dr. N. Shimojo, Tsukuba, Japan for his helpful comments, and Ms. E. Brejnakowska, Lodz, Poland for her kind corrections of our English text. The authors declare that the experiments comply with the current laws of Japan.
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Tanaka, S., Midorikawa, T. & Tokura, H. Effects of pressure exerted on the skin by elastic cord on the core temperature, body weight loss and salivary secretion rate at 35°C. Eur J Appl Physiol 96, 471–476 (2006). https://doi.org/10.1007/s00421-005-0099-z
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DOI: https://doi.org/10.1007/s00421-005-0099-z