Document Detail


Human temperature regulation during cycling with moderate leg ischaemia.
MedLine Citation:
PMID:  16075299     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The effect of graded ischaemia in the legs on the regulation of body temperature during steady-state exercise was investigated in seven healthy males. It was hypothesised that graded ischaemia in the working muscles increases heat storage within the muscles, which in turn potentiates sweat secretion during exercise. Blood perfusion in the working muscles was reduced by applying a supra-atmospheric pressure (+6.6 kPa) around the legs, which reduced maximal working capacity by 29%. Each subject conducted three separate test trials comprising 30 min of steady-state cycling in a supine position. Exercise with unrestricted blood flow (Control trial) was compared to ischaemic exercise conducted at an identical relative work rate (Relative trial), as well as at an identical absolute work rate (Absolute trial); the latter corresponding to a 20% increase in relative workload. The average (SD) increases in both the rectal and oesophageal temperatures during steady-state cycling was 0.3 (0.2) degrees C and did not significantly differ between the three trials. The increase in muscle temperature was similar in the Control (2.7 (0.3) degrees C) and Absolute (2.4 (0.7) degrees C) trials, but was substantially lower (P < 0.01) in the Relative trial (1.4 (0.8) degrees C). Ischaemia potentiated (P < 0.01) sweating on the forehead in the Absolute trial (24.2 (7.3) g m(-2) min(-1)) compared to the Control trial (13.4 (6.2) g m(-2) min(-1)), concomitant with an attenuated (P < 0.05) vasodilatation in the skin during exercise. It is concluded that graded ischaemia in working muscles potentiates the exercise sweating response and attenuates vasodilatation in the skin initiated by increased core temperature, effects which may be attributed to an augmented muscle metaboreflex.
Authors:
Alan Kacin; Petra Golja; Ola Eiken; Michael J Tipton; Jurij Gorjanc; Igor B Mekjavic
Related Documents :
16140169 - Nitric oxide pathway is an important modulator of heat loss in rats during exercise.
15469569 - In vitro and in vivo evaluation of a new active heat moisture exchanger.
24113319 - A multicentre year-long randomised controlled trial of exercise training targeting phys...
23729969 - Neuromuscular electrical stimulation and exercise for reducing trapezius muscle dysfunc...
3781969 - Arterial vs. rectal temperature in ponies: rest, exercise, co2 inhalation, and thermal ...
11476289 - Effect of skin sympathetic response to local or systemic cold exposure on thermoregulat...
2007399 - Energetics of locomotion in african pygmies.
15884649 - A comparison of the cytobrush and uterine lavage techniques to evaluate endometrial cyt...
2532179 - Beta-endorphin, catecholamines, and cortisol during exhaustive endurance exercise.
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2005-08-02
Journal Detail:
Title:  European journal of applied physiology     Volume:  95     ISSN:  1439-6319     ISO Abbreviation:  Eur. J. Appl. Physiol.     Publication Date:  2005 Oct 
Date Detail:
Created Date:  2005-11-28     Completed Date:  2006-02-16     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  100954790     Medline TA:  Eur J Appl Physiol     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  213-20     Citation Subset:  IM    
Affiliation:
Department of Automation, Biocybernetics and Robotics, Institute Jozef Stefan, Ljubljana, Slovenia. alan.kacin@vsz.uni-lj.si
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Adult
Body Temperature / physiology
Body Temperature Regulation / physiology*
Exercise Test
Humans
Ischemia
Leg / blood supply*
Male
Physical Exertion / physiology
Sweat / secretion
Vasodilation / physiology

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Circadian variation of cardiac autonomic nervous profile is affected in Japanese ambulance men with ...
Next Document:  KIS-RIS-PACS integration: the Marburg approach