Thermoregulatory responses to skin wetting during prolonged treadmill running. Med Sci Sports Exerc 1987 Feb;19(1):28-32
Date
02/01/1987Pubmed ID
3821452Scopus ID
2-s2.0-0023110957 (requires institutional sign-in at Scopus site) 13 CitationsAbstract
We examined the physiological responses to skin wetting during a 120-min level treadmill run to assess whether skin wetting would reduce the dehydration and the increase in core temperature associated with prolonged exercise. Testing was conducted in an environmental chamber (T = 29.5 degrees C, wind velocity = 3 m X sec-1) under two different humidity conditions (33 or 66% relative humidity). Ten male subjects performed two runs in each humidity condition; one served as a control run. The other included spraying the body with 50 ml of water (T = 29.5 degrees C) every 10 min. Spraying had no effect on rectal temperature (Tre), heart rate, oxygen consumption, perceived exertion, sweat loss, or percent change in plasma volume in both the humid and the dry conditions. Spraying produced a significant reduction in mean skin temperature (Tsk), which increased the (Tre - Tsk) gradient. At the same time, overall skin conductance (K) was decreased, presumably as a result of cutaneous vasoconstriction due to the low Tsk. Since heat transfer from the body's core to the skin is expressed by the equation: heat transfer = K X (Tre - Tsk) the spraying had no effect on heat transfer away from the core, and Tre remained unchanged.
Author List
Bassett DR Jr, Nagle FJ, Mookerjee S, Darr KC, Ng AV, Voss SG, Napp JPAuthor
Alexander V. Ng PhD Associate Professor in the Exercise Science department at Marquette UniversityMESH terms used to index this publication - Major topics in bold
AdultBody Temperature
Body Temperature Regulation
Humans
Humidity
Male
Oxygen Consumption
Physical Exertion
Rectum
Running
Skin Physiological Phenomena
Skin Temperature
Sweating
Water
