HEAT DEBT DURING COLD AIR EXPOSURE BEFORE AND AFTER COLD WATER IMMERSIONS

Authors
  1. Tikuisis, P.
  2. McCracken, D.H.
  3. Radomski, M.W.
Corporate Authors
Defence and Civil Inst of Environmental Medicine, Downsview ONT (CAN);Toronto Univ, Toronto ONT (CAN) Dept of Physiology
Abstract
Acclimation to cold can manifest itself in several different ways, insulative and metabolic being the most common. Bittel (J. Appl. Physiol.62(4):1627-1634,1987) has demonstrated that heat debt, which encompasses both heat production and heat loss, can be used as a unitary index of acclimation. However, contrary results are obtained if heat debt is calculated using a mean-weighted body temperature (T sub b) versus using the rate of heat storage (S). The present study examines the determination of heat debt using three methods of calculation, the first based on T sub B and the other two based on S where heat losses are measured in one and calculated in the other. Data were obtained from five healthy young males exposed to 10C air for 2 h on four different occassions. The first two exposures acted as control, the third followed five daily immersions in 15C water to induce acclimation and the fourth followed another five daily water immersions. TRUNCATED
Report Number
DCIEM-90-P-33 — Reprint
Date of publication
15 Feb 1991
Number of Pages
9
Reprinted from
J Appl Physiol, vol 71, no 1, 1991, p 60-68
DSTKIM No
92-00545
CANDIS No
103442
Format(s):
Hardcopy;Originator's fiche received by DSIS

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