Document Detail

Effect of pyridostigmine on the exercise-heat response of man.
MedLine Citation:
PMID:  2289489     Owner:  NLM     Status:  MEDLINE    
The effect of pyridostigmine on thermoregulatory responses was evaluated during exercise and heat stress. Eight heat acclimated, young adult male subjects received four doses of pyridostigmine (30 mg) or identical placebo tablets every 8 h, in a double blind, randomized, cross-over trial. A 30.3%, SD 4.6% inhibition of the circulating cholinesterase (ChE) activity was induced in the pyridostigmine-treated group. The subjects were exposed to 170-min exercise and heat-stress (dry bulb temperature, 33 degrees C; relative humidity 60%) consisting of 60 min in a sitting position and two bouts of 50-min walking (1.39 m.s-1, 5% gradient) which were separated by 10-min rest periods. No differences were found between treatments in the physiological responses and heat balance parameters at the end of exposure: heart rate (fc) was 141 beats.min-1, SD 16 and 150 beats.min-1, SD 12, rectal temperature (Tre) was 38.5 degrees C, SD 0.4 degrees and 38.6 degrees C, SD 0.3 degrees, heat storage was 60 W.m-2, SD 16 and 59 W.m-2, SD 15 and sweat rate was 678 g.h-1, SD 184 and 661 g.h-1, SD 133, in the pyridostigmine and placebo treatments, respectively. The changes in Tre and fc over the heat-exercise period were parallel in both study and control groups. Pyridostigmine caused a slight slowing of fc (5 beats.min-1) which was consistent throughout the entire exposure (P less than 0.001) but was of no clinical significance. The overall change in fc was similar for both groups.(ABSTRACT TRUNCATED AT 250 WORDS)
Y Epstein; R Arnon; D Moran; D S Seidman; Y Danon
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Publication Detail:
Type:  Clinical Trial; Journal Article; Randomized Controlled Trial    
Journal Detail:
Title:  European journal of applied physiology and occupational physiology     Volume:  61     ISSN:  0301-5548     ISO Abbreviation:  Eur J Appl Physiol Occup Physiol     Publication Date:  1990  
Date Detail:
Created Date:  1991-04-01     Completed Date:  1991-04-01     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0410266     Medline TA:  Eur J Appl Physiol Occup Physiol     Country:  GERMANY    
Other Details:
Languages:  eng     Pagination:  128-32     Citation Subset:  IM    
Heller Institute of Medical Research, Sheba Medical Center, Tel-Hashomer, Israel.
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MeSH Terms
Body Temperature Regulation / drug effects*
Body Weight / physiology
Cholinesterase Inhibitors / blood
Double-Blind Method
Energy Metabolism / physiology
Exercise / physiology*
Heart Rate / physiology
Hot Temperature
Oxygen Consumption / physiology
Pyridostigmine Bromide / pharmacology*
Random Allocation
Reg. No./Substance:
0/Cholinesterase Inhibitors; 101-26-8/Pyridostigmine Bromide

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