MEASUREMENT AND PREDICTION OF MAXIMAL SHIVERING CAPACITY IN HUMANS

PDF

Authors
  1. Eyolfson, D.A.
  2. Xu, X.
  3. Wessen, G.
  4. Tikuisis, P.
  5. Giesbrecht, G.G.
Corporate Authors
Defence and Civil Inst of Environmental Medicine, Downsview ONT (CAN);Manitoba Univ, Winnipeg MAN (CAN)
Abstract
Prediction formuale of shivering metabolism (Mshiv) are critical to the development of models of thermoregulation for cold exposure. Most formuale use a combination of body composition measures, with skin and core temperatures to predict ongoing shivering metabolism. Although maximum shivering capacity itself has not been predicted, a maximum shivering oxygen consumption (Mshivmas) of 1.41 O2 min 1 (-) (or 5 times resting metabolic rate) has been reported. We completed studies on 16 subjects (4 females) mean + or - SD: age = 24.9 + or - 6 yrs; height = 176 + or - 9 cm; weight = 76 + or - 19 kg; body fat = 21.3 + or - 5%; and VO2max = 51.8 + or - 10 ml-kb 1(-) min 1 (-). In this protocol, subjects were immersed in 8C water until metabolic rate increased and plateaued. Water temperature was then gradully increased at 0.8C min 1 (-) to a value of 20C. This was expected to further increase shivering heat production as peripheral cold receptors fire maximally at approximately equals to 20C. This in combination with the relatively low core temperature was hypothesized to stimulate maximal shivering heat production. TRUNCATED
Keywords
Water immersion
Report Number
DCIEM-98-CR-27 — Contractor Report
Date of publication
01 Mar 1998
Number of Pages
15
DSTKIM No
98-02004
CANDIS No
508768
Format(s):
Hardcopy;Document Image stored on Optical Disk

Permanent link

Document 1 of 1

Date modified: