Factors Which Alter Human Physiological Responses During Exercise-Heat Acclimation PDF Download
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 22
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Book Description
Researchers generally agree that high aerobic fitness achieved through physical training will reduce the physiological strain to exercise in the heat, but does not replace the benefits of an exercise-heat acclimation program. In addition, high aerobic fitness is hypothesized as a major factor in the small decay and rapid re-acclimation of individuals after they ceased exercising in hot environments. However, recent work from our laboratory suggests that improved aerobic fitness by physical training must be associated with significant elevations in core temperature during the training process in order to improve exercise-heat tolerance. Two recent studies comparing men and women with similar aerobic fitness indicate no major physiological differences between genders in both humid and dry heat for cardiovascular and thermoregulatory responses to these environments either before or after acclimation. Our laboratory has reported that after exercise-heat acclimation under wet conditions (mild or hot), females tolerate the heat in a more efficient fashion than males while under hot-dry conditions males seem to be at some physiological advantage. Even fewer studies are reported which evaluate physiological differences in heat tolerance to exercise in relation to age. In general, exercise-heat tolerance is reduced in pre-pubertal children (boys and girls) and older adults (men and women) compared to young men and women. However, aerobically fit older adults seem to have far fewer decrements in the performance of exercise in the heat than less fit older adults.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 22
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Book Description
Researchers generally agree that high aerobic fitness achieved through physical training will reduce the physiological strain to exercise in the heat, but does not replace the benefits of an exercise-heat acclimation program. In addition, high aerobic fitness is hypothesized as a major factor in the small decay and rapid re-acclimation of individuals after they ceased exercising in hot environments. However, recent work from our laboratory suggests that improved aerobic fitness by physical training must be associated with significant elevations in core temperature during the training process in order to improve exercise-heat tolerance. Two recent studies comparing men and women with similar aerobic fitness indicate no major physiological differences between genders in both humid and dry heat for cardiovascular and thermoregulatory responses to these environments either before or after acclimation. Our laboratory has reported that after exercise-heat acclimation under wet conditions (mild or hot), females tolerate the heat in a more efficient fashion than males while under hot-dry conditions males seem to be at some physiological advantage. Even fewer studies are reported which evaluate physiological differences in heat tolerance to exercise in relation to age. In general, exercise-heat tolerance is reduced in pre-pubertal children (boys and girls) and older adults (men and women) compared to young men and women. However, aerobically fit older adults seem to have far fewer decrements in the performance of exercise in the heat than less fit older adults.
Author: Committee on Military Nutrition Research
Publisher: National Academies Press
ISBN: 0309556775
Category : Technology & Engineering
Languages : en
Pages : 585
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Book Description
This book reviews the research pertaining to nutrient requirements for working in cold or in high-altitude environments and states recommendations regarding the application of this information to military operational rations. It addresses whether, aside from increased energy demands, cold or high-altitude environments elicit an increased demand or requirement for specific nutrients, and whether performance in cold or high-altitude environments can be enhanced by the provision of increased amounts of specific nutrients.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 100
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Book Description
This report provides a comprehensive overview of the normal human physiological responses to environmental and exercise-related heat stress, with emphasis placed on acute heat exposure and acclimation produced by repeated heat exposure. In addition, the report reviews biomedical factors that modify exercise-heat tolerance such as aerobic fitness, dehydration, circadian patterns and sleep loss and medications. Also, the report reviews thermoregulatory responses of special populations such as women, blacks, children, older adults and spinal cord injured populations. Temperature Regulation, Body temperature, Heat stress, Heat loss, Sweating, Skin blood flow.
Author: Michitoshi Inoue
Publisher: Springer Science & Business Media
ISBN: 4431683674
Category : Medical
Languages : en
Pages : 330
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Book Description
Research centering on blood flow in the heart continues to hold an important position, especially since a better understanding of the subject may help reduce the incidence of coronary arterial disease and heart attacks. This book summarizes recent advances in the field; it is the product of fruitful cooperation among international scientists who met in Japan in May, 1990 to discuss the regulation of coronary blood flow.
Author: Julien D. Périard
Publisher: Springer
ISBN: 3319935151
Category : Medical
Languages : en
Pages : 294
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Book Description
The book is designed to provide a flowing description of the physiology of heat stress, the illnesses associated with heat exposure, recommendations on optimising health and performance, and an examination of Olympic sports played in potentially hot environmental conditions. In the first section the book examines how heat stress effects performance by outlining the basics of thermoregulation and how these responses impact on cardiovascular, central nervous system, and skeletal muscle function. It also outlines the pathophysiology and treatment of exertional heat illness, as well as the role of hydration status during exercise in the heat. Thereafter, countermeasures (e.g. cooling and heat acclimation) are covered and an explanation as to how they may aid in decreasing the incidence of heat illness and minimise the impairment in performance is provided. A novel and particular feature of the book is its inclusion of sport-specific chapters in which the influence of heat stress on performance and health is described, as well as strategies and policies adopted by the governing bodies in trying to offset the deleterious role of thermal strain. Given the breadth and scope of the sections, the book will be a reference guide for clinicians, practitioners, coaches, athletes, researchers, and students.
Author: Carol J. Greenleaf
Publisher:
ISBN:
Category : Acclimatization
Languages : en
Pages : 196
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Book Description
Author: K. B. Pandolf
Publisher:
ISBN:
Category :
Languages : en
Pages : 28
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Book Description
The responses of men to changes in environmental temperature have provided a basis for the understanding of human heat tolerance and thermoregulation. There appears to be less certainty about the thermoregulatory patterns of women. Physiological responses to heat stress may differ between genders due to several factors which include the lower cardiorespiratory fitness, higher body fat content, lower body weight, and lower skin surface area and higher surface area-to-mass ratio of women compared to men. In addition, fluctuating horminal levels of estrogen and progesterone accompanying the menstrual cycle may influence women's tolerance to heat stress. Since the US Army is currently composed of greater than 10% females, it has become necessary to examine heat responses of females to exercise-heat stress and heat acclimation. Our Institute has conducted experiments comparing men and women for exercise-heat tolerance and acclimation over a wide range of environmental conditions. Originator-supplied keywords include: gender related differences; heat acclimation; heat balance and transfer; hypohydration; physiological responses; prolonged heat exposure.
Author: Charles M. Tipton
Publisher: Lippincott Williams & Wilkins
ISBN: 9780781747264
Category : Medical
Languages : en
Pages : 730
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Book Description
Written by international experts in physiology, exercise physiology, and research, ACSM's Advanced Exercise Physiology gives students an advanced level of understanding of exercise physiology. It emphasizes the acute and chronic effects of exercise on various physiological systems in adults and the integrative nature of these physiological responses. Chapters detail how different body systems respond to exercise. Systems include nervous, skeletal, muscular, respiratory, cardiovascular, gastrointestinal, metabolic, endocrine, immune, renal, and hematopoietic systems. Additional chapters explain how these responses are altered by heat, cold, hypoxia, microgravity, bed rest, and hyperbaria. Milestones of Discovery pages describe classic or memorable experiments in exercise physiology.
Author: Kent B. Pandolf
Publisher:
ISBN:
Category : Acclimatization
Languages : en
Pages : 664
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Book Description
Author: Lawrence E. Armstrong
Publisher: Human Kinetics
ISBN: 9780736037716
Category : Medical
Languages : en
Pages : 300
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Book Description
The only text to focus exclusively on heat-related illnesses. Full of practical advice for professionals in a variety of medical, academic, & commercial settings. Learn how to identify, treat & prevent exertional heat illnesses & ensure your sporting events are safe.
