Physiological Responses of Exercised-Fatigued Individuals Exposed to Wet-Cold Conditions

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Authors
  1. Tikuisis, P.
  2. Ducharme, M.B.
  3. Moroz, D.
  4. Jacobs, I.
Corporate Authors
Defence and Civil Inst of Environmental Medicine, Downsview ONT (CAN)
Abstract
Physiological responses of exercised-fatigued individuals exposed to wel-cold conditions. J. Appl. Physiol, 86(4): 1319-1328, 1999. Thirteen healthy and fit men (age = 27 + or - 8 (SD) yr, height = 177 + or - 5 cm, mass + 75 + or - 7 kg body fat + 14 + or - 5%, maximal O2 consumption = 51 + or - 4 ml-kg 1(-). min 1(-)) participated in an experiment designed to test their thermo-regulatory response to a challenging cold exposure after 5 h of demanding mixed exercise during which only water was consumed. Subjects expended 7,314 + or - 741 kJ on cycling, rowing, and treadmill-walking machines, performed 8.403 + or - 1,401 kg-m ofmechanical work during resistance exercises, and completed 120 inclined sit-ups. Subjects then assumed a seated position in a 10C air environment while wearing shorts, T-shirt, rain hat, and neoprene gloves and boots. After 30 min the subjects were showered continuously with cold water (-920 ml/min at 10C) on their backs accompanied by a 6 km/h wind for up to 4 h. Blood samples were taken from the nondominant arm every 30 min during the exposure and assayed for energy metabolites, hormones, indexes of hydration, and neurotransmitters. TRUNCATED
Keywords
Thermoregulation;Heat debt;Rectal temperature
Report Number
DCIEM-98-P-92 — Reprint
Date of publication
01 Jul 1999
Number of Pages
13
Reprinted from
J Appl. Physiol, vol 86, no 4, 1999, p 1319-1328
DSTKIM No
CA001883
CANDIS No
511120
Format(s):
Hardcopy;Document Image stored on Optical Disk

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