EFFECTS OF MUSCLE GLYCOGEN AND PLASMA FFA AVAILABILITY ON HUMAN METABOLIC RESPONSES IN COLD WATER

Authors
  1. Martineau, L.
  2. Jacobs, I.
Corporate Authors
Defence and Civil Inst of Environmental Medicine, Downsview ONT (CAN);Toronto Univ, Toronto ONT (CAN) Dept of Community Health
Abstract
The purpose of the study was to investigate whether simultaneous alterations in the availability of plasma free fatty acids (FFA) and muscle glycogen would impair the maintenance of thermal balance during cold water immersion in humans. Eight seminude subjects were immersed on two occasions in 18C water for 90 min or until rectal temperature (T sub re) decreased to 35.5C. Each immersion followed 2.5 days of a specific dietary and exercise regimen designed to elicit low (LOW) or high (HIGH) glycogen levels in large skeletal muscle groups. Nicotinic acid was administered for 2 h before and during immersion to inhibit white adipose tissue lipolysis. Biopsies from the vastus lateralis showed that the glycogen concentration before the immersion was significantly lower in LOW (223 + or - 19 mmol.glucose units.kg 1(-) dry muscle) than in HIGH (473 + or - 24). TRUNCATED
Report Number
DCIEM-91-64 — Research Paper; Reprint
Date of publication
15 May 1991
Number of Pages
9
Reprinted from
J Appl Physiol, vol 71, no 4, 1991, p 1331-1339
DSTKIM No
92-00296
CANDIS No
103195
Format(s):
Hardcopy;Originator's fiche received by DSIS

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