Alterations in Lipid Metabolism and Exercise Performance During Passive Heat Exposure and Subsequent Exercise in the Heat
Heat exposure causes several physiological and metabolic alterations. Although lipids are vital in sustaining energy production, heat-induced alterations in lipid metabolism have not been clearly established. CHAPTER 1 reviews the known metabolic alterations resulting from heat stress, with a specif...
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ndltd-LACETR-oai-collectionscanada.gc.ca-OOU.#10393-236652014-06-14T03:49:57ZAlterations in Lipid Metabolism and Exercise Performance During Passive Heat Exposure and Subsequent Exercise in the HeatO'Hearn, Katharinenon-esterified fatty acidshyperthermialipid metabolismwork capacityHeat exposure causes several physiological and metabolic alterations. Although lipids are vital in sustaining energy production, heat-induced alterations in lipid metabolism have not been clearly established. CHAPTER 1 reviews the known metabolic alterations resulting from heat stress, with a specific focus on changes in whole-body lipid utilization and plasma lipids. CHAPTER 1also outlines the physiological changes caused by heat stress, and their role in reducing exercise performance. The study presented in CHAPTER 2 has shown that, compared to thermoneutral conditions, NEFA concentrations were 37% higher following passive heating and 34% higher following exercise in the heat, without significant changes in whole-body lipid utilization. In addition, the level of hyperthermia attained during passive pre-heating and exercise in the heat resulted in a 13% decrease in total external work and a significantly higher rate of perceived exertion. CHAPTER 3 summarizes the study results and presents the limitations and applications of the study.2013-01-15T19:49:45Z2013-01-15T19:49:45Z20132013-01-15Thèse / Thesishttp://hdl.handle.net/10393/23665en |
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non-esterified fatty acids hyperthermia lipid metabolism work capacity |
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non-esterified fatty acids hyperthermia lipid metabolism work capacity O'Hearn, Katharine Alterations in Lipid Metabolism and Exercise Performance During Passive Heat Exposure and Subsequent Exercise in the Heat |
description |
Heat exposure causes several physiological and metabolic alterations. Although lipids are vital in sustaining energy production, heat-induced alterations in lipid metabolism have not been clearly established. CHAPTER 1 reviews the known metabolic alterations resulting from heat stress, with a specific focus on changes in whole-body lipid utilization and plasma lipids. CHAPTER 1also outlines the physiological changes caused by heat stress, and their role in reducing exercise performance. The study presented in CHAPTER 2 has shown that, compared to thermoneutral conditions, NEFA concentrations were 37% higher following passive heating and 34% higher following exercise in the heat, without significant changes in whole-body lipid utilization. In addition, the level of hyperthermia attained during passive pre-heating and exercise in the heat resulted in a 13% decrease in total external work and a significantly higher rate of perceived exertion. CHAPTER 3 summarizes the study results and presents the limitations and applications of the study. |
author |
O'Hearn, Katharine |
author_facet |
O'Hearn, Katharine |
author_sort |
O'Hearn, Katharine |
title |
Alterations in Lipid Metabolism and Exercise Performance During Passive Heat Exposure and Subsequent Exercise in the Heat |
title_short |
Alterations in Lipid Metabolism and Exercise Performance During Passive Heat Exposure and Subsequent Exercise in the Heat |
title_full |
Alterations in Lipid Metabolism and Exercise Performance During Passive Heat Exposure and Subsequent Exercise in the Heat |
title_fullStr |
Alterations in Lipid Metabolism and Exercise Performance During Passive Heat Exposure and Subsequent Exercise in the Heat |
title_full_unstemmed |
Alterations in Lipid Metabolism and Exercise Performance During Passive Heat Exposure and Subsequent Exercise in the Heat |
title_sort |
alterations in lipid metabolism and exercise performance during passive heat exposure and subsequent exercise in the heat |
publishDate |
2013 |
url |
http://hdl.handle.net/10393/23665 |
work_keys_str_mv |
AT ohearnkatharine alterationsinlipidmetabolismandexerciseperformanceduringpassiveheatexposureandsubsequentexerciseintheheat |
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1716669506790621184 |