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4 edition of The influence of aerobic fitness and body fatness on tolerance to uncompensable heat stress found in the catalog.

The influence of aerobic fitness and body fatness on tolerance to uncompensable heat stress

Glen A. Selkirk

The influence of aerobic fitness and body fatness on tolerance to uncompensable heat stress

by Glen A. Selkirk

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Published by National Library of Canada in Ottawa .
Written in English


Edition Notes

Thesis (M.Sc.) -- University of Toronto, 2000.

SeriesCanadian theses = -- Thèses canadiennes
The Physical Object
FormatMicroform
Pagination2 microfiches : negative. --
ID Numbers
Open LibraryOL19540342M
ISBN 100612533557
OCLC/WorldCa50755100

Thermoregulation is the ability of an organism to keep its body temperature within certain boundaries, even when the surrounding temperature is very different. A thermoconforming organism, by contrast, simply adopts the surrounding temperature as its own body temperature, thus avoiding the need for internal thermoregulation.   This study determined whether 1) exhaustion from heat strain occurs at the same body temperatures during exercise in the heat when subjects are euhydrated as when they are hypohydrated, 2) aerobic fitness influences the body temperature at which exhaustion from heat strain occurs, and 3) curves could be developed to estimate exhaustion rates at a given level of physiological strain.

  Those that are identified as “intolerant” have a lower level of aerobic fitness and higher body fatness (Lisman et al. ), and many would probably not be successful during the current PES testing. Instead, the heat tolerance test should create an uncompensable condition, which is more typically associated with wearing PCE, where core.   Selkirk GA, McLellan TM () Influence of aerobic fitness and body fatness on tolerance to uncompensable heat stress. J Appl Physiol – CAS PubMed Google Scholar Selkirk GA, McLellan TM, Wright HE, Rhind SG () Mild endotoxemia, NF-kappaB translocation, and cytokine increase during exertional heat stress in trained and.

  Selkirk GA, McLellan TM () Influence of aerobic fitness and body fatness on tolerance to uncompensable heat stress. J Appl Physiol – Google Scholar Taylor CR, Rowntree VJ () Temperature regulation and heat balance in running cheetahs: a . The Influence Of Aerobic Fitness and Body Fatness On Tolerance To Uncornpensable Heat-Stress. Master of Science, Glen A. Selkirk Graduate Department of Cornmunity Health University of Toronto Abstract The purpose of this study was to detemine the separate and combined importance of aerobic fitness and body fatness to uncompensable heat stress.


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The influence of aerobic fitness and body fatness on tolerance to uncompensable heat stress by Glen A. Selkirk Download PDF EPUB FB2

Twenty-four men and women were matched for aerobic fitness and body fatness in one of four groups (4 men and 2 women in each group). Aerobic fitness was expressed per kilogram of lean body mass (LBM) to eliminate the influence of body fatness on the expression of by:   Heat acclimation, aerobic fitness, and hydration effects on tolerance during uncompensable heat stress.

J Appl Physiol 84 Link | ISI Google Scholar; 10 Cheung SS, McLellan TM. Influence of short-term aerobic training and hydration status on tolerance to uncompensable heat stress.

Eur J Appl Physiol 78 Crossref | ISI Cited by: Influence of aerobic fitness and body fatness on tolerance to uncompensable heat stress GLEN A. SELKIRK,1 AND TOM M. MCLELLAN1,2 1Faculty of Physical Education and Health, Exercise Science, University of Toronto, Toronto M5S 2W6; and 2Environmental and Applied Ergonomics Section, Defence and Civil Institute of Environmental Medicine, Toronto, Ontario, Canada M3M 3B9.

In many athletic and occupational settings, the wearing of protective clothing in warm or hot environments creates conditions of uncompensable heat stress where the body is unable to maintain a thermal steady state.

Therefore, special precautions must be taken to minimise the threat of thermal injury. Assuming that manipulations known to reduce thermoregulatory strain during compensable heat Cited by: In contrast, neither short term aerobic training or heat acclimation significantly improve exercise-heat tolerance during uncompensable heat stress.

While short term aerobic training is relatively ineffective, long term improvements in physical fitness appear to provide some degree of by: While the greater aerobic fitness in SM did not appear to present any benefits from a core temperature or sweating perspective, their subjective tolerance to uncompensable heat stress (i.e.

The purpose of this review, therefore, is to examine the impact of aerobic fitness on tolerance to uncompensable heat stress. A high level of cardiorespiratory fitness has been associated with an improved exercise-heat tolerance since the initial theoretical connection was made by Robinson et al.

() and Bean and Eichna (). The aim of this study was to examine the influence of aerobic fitness and exercise intensity on the development of thermal and cardiovascular strain in uncompensable heat stress conditions.

The purpose of the present study was to determine the separate and combined effects of aerobic fitness, short-term heat acclimation, and hypohydration on tolerance during light exercise while wearing nuclear, biological, and chemical protective clothing in the heat (40 degrees C, 30% relative humidity).

Men who were moderately fit [(MF). This is relevant with regard to heat tolerance during physical performance when additional heat is produced by the muscles. Aerobic fitness positively influences heat-tolerance in middle-aged and older adults [14,15].

Although there is evidence that aerobic capacity is reduced in the heat in young people, so far no studies on older adults are. Dear Editor-in-Chief: We wish to challenge some of the expressed views in the review by Dr. Mora-Rodriguez entitled, “Influence of Aerobic Fitness on Thermoregulation during Exercise in the Heat” ().Dr.

Mora-Rodriguez stated that “contrary to what often is believed, aerobically trained individuals do not withstand higher core temperatures before fatiguing than untrained individuals. The aim of this study was to examine the influence of aerobic fitness and exercise intensity on the development of thermal and cardiovascular strain in uncompensable heat stress conditions.

In three separate trials, eight aerobically trained and eight untrained subjects cycled to exhaustion at 60% (H60%) and 75% (H75%) of maximal oxygen uptake $$ \left({\dot{V}{\text{O}}_{{ 2.

It was concluded that exercise-heat tolerance in this uncompensable heat-stress environment is not influenced by short-term heat acclimation but is significantly improved by long-term aerobic fitness.

In contrast, neither short term aerobic training or heat acclimation significantly improve exercise-heat tolerance during uncompensable heat stress. While short term aerobic training is relatively ineffective, long term improvements in physical fitness appear to provide some degree of protection.

Individuals with higher proportions of body fat. Introduction. Body water and electrolyte balance perturbations are common when performing strenuous physical work and especially during exposure to the environmental extremes of heat [], cold [], and high altitude [].The resultant fluid and electrolyte losses often modify physiological strain to a particular exercise/environmental stress and sometimes impair environmental tolerance and aerobic.

This study determined whether 1) exhaustion from heat strain occurs at the same body temperatures during exercise in the heat when subjects are euhydrated as when they are hypohydrated, 2) aerobic fitness influences the body temperature at which exhaustion from heat strain occurs, and 3) curves could be developed to estimate exhaustion rates at a given level of physiological strain.

Seventeen. Tom M. McLellan's research works with 4, citations reads, including: Caffeine and energy drink use by combat arms soldiers in Afghanistan as a countermeasure for sleep loss and.

Full Text; PDF ( K) PDF-Plus ( K) Citing articles; Protective clothing ensembles and physical employment standards 1. Tom M. McLellan, a George Havenith b a TM McLellan Research Inc., 25 Dorman Drive, Stouffville, ON L4A 8A7, Canada.

b Environmental Ergonomics Research Centre, Loughborough Design School, Loughborough University, Loughborough, UK. In summary, this study leads to the following observations regarding exercise-heat tolerance in an uncompensable heat-stress environment.1) High aerobic fitness from long-term training and habitual exercise is of significant benefit.2) When fluid replacement is provided, heat acclimation does not provide significant benefit regardless of.

Influence of aerobic fitness and body fatness on tolerance to uncompensable heat stress. This study examined the independent and combined importance of aerobic fitness and body fatness on. S.S. Cheung, T.M. McLellanHeat acclimation, aerobic fitness, and hydration effects on tolerance during uncompensable heat stress J Appl Physiol .Selkirk GA, McLellan TM.

Influence of aerobic fitness and body fatness on tolerance to uncompensable heat stress. Journal of Applied Physiology. ; 91 (5)– [Google Scholar] Semenza JC, Rubin CH, Falter KH, Selanikio JD, Flanders WD, Howe HL, Wilhelm JL. Heat-related deaths during the July heat wave in Chicago.Influence of aerobic fitness and body fatness on tolerance to uncompensable heat stress.

J. Appl. Physiol. Medline, ISI.