The Role Of Physical Fitness On Cardiovascular Responses To Stress

Download The Role Of Physical Fitness On Cardiovascular Responses To Stress full books in PDF, epub, and Kindle. Read online The Role Of Physical Fitness On Cardiovascular Responses To Stress ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!

The Role of Physical Fitness on Cardiovascular Responses to Stress

Author : Arto J Hautala
Publisher : Frontiers Media SA
ISBN 13 : 2889194639
Total Pages : 96 pages
Book Rating : 4.8/5 (891 download)

DOWNLOAD NOW!

Book Synopsis The Role of Physical Fitness on Cardiovascular Responses to Stress by : Arto J Hautala

Download or read book The Role of Physical Fitness on Cardiovascular Responses to Stress written by Arto J Hautala and published by Frontiers Media SA. This book was released on 2015-03-12 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cardiovascular responses to physical and/ or mental stressors has been a topic of great interest for some time. For example, significant changes of cardiovascular control and reactivity have been highlighted as important mechanisms for the protective effect of exercise as a simple and effective, non medical therapy for many pathologies. However, despite the great number of studies performed to date (e.g. >54,000 entries in Pubmed for “cardiovascular stress”), important questions of the role stress has on cardiovascular function still remain. For instance, What factors account for the different cardiovascular responses between mental and physical stressors? How do these different components of the cardiovascular system interact during stress? Which cardiovascular responses to stress are the most important for identifying normal, depressed, and enhanced cardiovascular function? Can these stress-induced responses assist with patient diagnosis and prognosis? What impact does physical fitness have on the relationship between cardiovascular function and health? The current topic examined our current understanding of cardiovascular responses to stress and the significant role that physical fitness has on these responses for improved function and health. Manuscripts focusing on heart rate variability (HRV), heart rate recovery, and other novel cardiovascular assessments were especially encouraged.

Cardiovascular Responses to Exercise

Author : Lusha Xiang
Publisher : Morgan & Claypool Publishers
ISBN 13 : 1615043454
Total Pages : 127 pages
Book Rating : 4.6/5 (15 download)

DOWNLOAD NOW!

Book Synopsis Cardiovascular Responses to Exercise by : Lusha Xiang

Download or read book Cardiovascular Responses to Exercise written by Lusha Xiang and published by Morgan & Claypool Publishers. This book was released on 2012 with total page 127 pages. Available in PDF, EPUB and Kindle. Book excerpt: Exercise is the act of increasing metabolic rate for the purpose of enhancing physical fitness. Exercise can be one of the most stressful physiological responses that the body undertakes. With exercise, there are increases in metabolic rate, heart rate, blood flow (hyperemia), respiration, and heat production. The increased metabolic requirement during exercise is well met by an increased blood flow (functional hyperemia) and oxygen supply to the exercising tissue, which is regulated by multiple local and systemic mechanisms. The local mechanisms (factors) are responsible for mediating the muscle homeostasis and vascular conductance to match the increased metabolic requirement, whereas the systemic mechanisms are responsible for the maintenance of blood pressure and global cardiovascular homeostasis, including the increase in and redistribution of cardiac output, which is mainly mediated by sympathetic activation. For instance, the substantial decreases in vascular resistance and resultant large increase in blood flow during exercise require higher blood pressure and more cardiac output, such that the metabolically active muscle can be perfused with adequate blood flow. This book will provide an overview of the cardiovascular responses to exercise under physiological conditions as well as some pathological circumstances. Table of Contents: Capillary Perfusion in Skeletal Muscle During Exercise / Local Control of Arteriolar Diameter and Blood Flow During Exercise / Systemic Control of Cardiovascular Response to Exercise / Cardiovascular Response to Exercise under Pathological Conditions / References / Author Biography

Cardiovascular Responses to Exercise

Author : Lusha Xiang
Publisher : Biota Publishing
ISBN 13 : 1615047271
Total Pages : 135 pages
Book Rating : 4.6/5 (15 download)

DOWNLOAD NOW!

Book Synopsis Cardiovascular Responses to Exercise by : Lusha Xiang

Download or read book Cardiovascular Responses to Exercise written by Lusha Xiang and published by Biota Publishing. This book was released on 2016-12-01 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt: Exercise is the act of increasing metabolic rate for the purpose of enhancing physical fitness. Exercise can be one of the most stressful physiological responses that the body undertakes. With exercise, there are increases in metabolic rate, heart rate, blood flow (hyperemia), respiration, and heat production. The increased metabolic requirement during exercise is well met by an increased blood flow (functional hyperemia) and oxygen supply to the exercising tissue, which is regulated by multiple local and systemic mechanisms. The local mechanisms (factors) are responsible for mediating the muscle homeostasis and vascular conductance to match the increased metabolic requirement, whereas the systemic mechanisms are responsible for the maintenance of blood pressure and global cardiovascular homeostasis, including the increase in and redistribution of cardiac output, which is mainly mediated by sympathetic activation. For instance, the substantial decreases in vascular resistance and resultant large increase in blood flow during exercise require higher blood pressure and more cardiac output, such that the metabolically active muscle can be perfused with adequate blood flow. This book will provide an overview of the cardiovascular responses to exercise under physiological conditions as well as some pathological circumstances.

Regulation of Coronary Blood Flow

Author : Michitoshi Inoue
Publisher : Springer Science & Business Media
ISBN 13 : 4431683674
Total Pages : 330 pages
Book Rating : 4.4/5 (316 download)

DOWNLOAD NOW!

Book Synopsis Regulation of Coronary Blood Flow by : Michitoshi Inoue

Download or read book Regulation of Coronary Blood Flow written by Michitoshi Inoue and published by Springer Science & Business Media. This book was released on 2013-11-09 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Educating the Student Body

Author : Committee on Physical Activity and Physical Education in the School Environment
Publisher : National Academies Press
ISBN 13 : 0309283140
Total Pages : 503 pages
Book Rating : 4.3/5 (92 download)

DOWNLOAD NOW!

Book Synopsis Educating the Student Body by : Committee on Physical Activity and Physical Education in the School Environment

Download or read book Educating the Student Body written by Committee on Physical Activity and Physical Education in the School Environment and published by National Academies Press. This book was released on 2013-11-13 with total page 503 pages. Available in PDF, EPUB and Kindle. Book excerpt: Physical inactivity is a key determinant of health across the lifespan. A lack of activity increases the risk of heart disease, colon and breast cancer, diabetes mellitus, hypertension, osteoporosis, anxiety and depression and others diseases. Emerging literature has suggested that in terms of mortality, the global population health burden of physical inactivity approaches that of cigarette smoking. The prevalence and substantial disease risk associated with physical inactivity has been described as a pandemic. The prevalence, health impact, and evidence of changeability all have resulted in calls for action to increase physical activity across the lifespan. In response to the need to find ways to make physical activity a health priority for youth, the Institute of Medicine's Committee on Physical Activity and Physical Education in the School Environment was formed. Its purpose was to review the current status of physical activity and physical education in the school environment, including before, during, and after school, and examine the influences of physical activity and physical education on the short and long term physical, cognitive and brain, and psychosocial health and development of children and adolescents. Educating the Student Body makes recommendations about approaches for strengthening and improving programs and policies for physical activity and physical education in the school environment. This report lays out a set of guiding principles to guide its work on these tasks. These included: recognizing the benefits of instilling life-long physical activity habits in children; the value of using systems thinking in improving physical activity and physical education in the school environment; the recognition of current disparities in opportunities and the need to achieve equity in physical activity and physical education; the importance of considering all types of school environments; the need to take into consideration the diversity of students as recommendations are developed. This report will be of interest to local and national policymakers, school officials, teachers, and the education community, researchers, professional organizations, and parents interested in physical activity, physical education, and health for school-aged children and adolescents.

Cardiovascular Response to Exercise

Author : Gerald F. Fletcher
Publisher : Wiley-Blackwell
ISBN 13 : 9780879935597
Total Pages : 446 pages
Book Rating : 4.9/5 (355 download)

DOWNLOAD NOW!

Book Synopsis Cardiovascular Response to Exercise by : Gerald F. Fletcher

Download or read book Cardiovascular Response to Exercise written by Gerald F. Fletcher and published by Wiley-Blackwell. This book was released on 1994 with total page 446 pages. Available in PDF, EPUB and Kindle. Book excerpt: The third edition of this popular and successful text has been fully revised and updated to take account of recent advances in the field, particularly in the physiology and pathophysiology of many disease processes. The text retains the original format of relevant physiology, test selection and test interpretation by case example. Essential aspects of paediatric chemical pathology, inborn errors of metabolism, reproductive endocrinology, tumours and toxicology are now included. As chemical pathology is receiving specific attention in medical courses, this text has been adapted to present this information in an understandable form, making it suitable for medical undergraduates and for medical and science postgraduates studying for exams of Colleges of Pathology and professional associations."

Pituitary Adenylate Cyclase-Activating Polypeptide

Author : Hubert Vaudry
Publisher : Springer Science & Business Media
ISBN 13 : 9781402073069
Total Pages : 432 pages
Book Rating : 4.0/5 (73 download)

DOWNLOAD NOW!

Book Synopsis Pituitary Adenylate Cyclase-Activating Polypeptide by : Hubert Vaudry

Download or read book Pituitary Adenylate Cyclase-Activating Polypeptide written by Hubert Vaudry and published by Springer Science & Business Media. This book was released on 2003 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pituitary Adenylate Cyclase-Activating Polypeptide is the first volume to be written on the neuropeptide PACAP. It covers all domains of PACAP from molecular and cellular aspects to physiological activities and promises for new therapeutic strategies. Pituitary Adenylate Cyclase-Activating Polypeptide is the twentieth volume published in the Endocrine Updates book series under the Series Editorship of Shlomo Melmed, MD.

Effects of Stressful Life Events on Cardiovascular Response to Exercise Stress Testin

Author : Lisa Dorothy Bosworth Jasper
Publisher :
ISBN 13 :
Total Pages : 112 pages
Book Rating : 4.:/5 (268 download)

DOWNLOAD NOW!

Book Synopsis Effects of Stressful Life Events on Cardiovascular Response to Exercise Stress Testin by : Lisa Dorothy Bosworth Jasper

Download or read book Effects of Stressful Life Events on Cardiovascular Response to Exercise Stress Testin written by Lisa Dorothy Bosworth Jasper and published by . This book was released on 1990 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:

A Clinical Guide to the Treatment of the Human Stress Response

Author : George S. Jr. Everly
Publisher : Springer Science & Business Media
ISBN 13 : 0306478005
Total Pages : 482 pages
Book Rating : 4.3/5 (64 download)

DOWNLOAD NOW!

Book Synopsis A Clinical Guide to the Treatment of the Human Stress Response by : George S. Jr. Everly

Download or read book A Clinical Guide to the Treatment of the Human Stress Response written by George S. Jr. Everly and published by Springer Science & Business Media. This book was released on 2006-02-20 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt: This updated edition covers a range of new topics, including stress and the immune system, post-traumatic stress and crisis intervention, Eye Movement Desensitization and Reprocessing (EMDR), Critical Incident Stress Debriefing (CISD), Crisis Management Briefings in response to mass disasters and terrorism, Critical Incident Stress Management (CISM), spirituality and religion as stress management tools, dietary factors and stress, and updated information on psychopharmacologic intervention in the human stress response. It is a comprehensive and accessible guide for students, practitioners, and researchers in the fields of psychology, psychiatry, medicine, nursing, social work, and public health.

Exercise and Diabetes

Author : Sheri R. Colberg
Publisher : American Diabetes Association
ISBN 13 : 158040507X
Total Pages : 554 pages
Book Rating : 4.5/5 (84 download)

DOWNLOAD NOW!

Book Synopsis Exercise and Diabetes by : Sheri R. Colberg

Download or read book Exercise and Diabetes written by Sheri R. Colberg and published by American Diabetes Association. This book was released on 2013-05-30 with total page 554 pages. Available in PDF, EPUB and Kindle. Book excerpt: Physical movement has a positive effect on physical fitness, morbidity, and mortality in individuals with diabetes. Although exercise has long been considered a cornerstone of diabetes management, many health care providers fail to prescribe it. In addition, many fitness professionals may be unaware of the complexities of including physical activity in the management of diabetes. Giving patients or clients a full exercise prescription that take other chronic conditions commonly accompanying diabetes into account may be too time-consuming for or beyond the expertise of many health care and fitness professionals. The purpose of this book is to cover the recommended types and quantities of physical activities that can and should be undertaken by all individuals with any type of diabetes, along with precautions related to medication use and diabetes-related health complications. Medications used to control diabetes should augment lifestyle improvements like increased daily physical activity rather than replace them. Up until now, professional books with exercise information and prescriptions were not timely or interactive enough to easily provide busy professionals with access to the latest recommendations for each unique patient. However, simply instructing patients to “exercise more” is frequently not motivating or informative enough to get them regularly or safely active. This book is changing all that with its up-to-date and easy-to-prescribe exercise and physical activity recommendations and relevant case studies. Read and learn to quickly prescribe effective and appropriate exercise to everyone.

Food Components to Enhance Performance

Author : Institute of Medicine
Publisher : National Academies Press
ISBN 13 : 030905088X
Total Pages : 560 pages
Book Rating : 4.3/5 (9 download)

DOWNLOAD NOW!

Book Synopsis Food Components to Enhance Performance by : Institute of Medicine

Download or read book Food Components to Enhance Performance written by Institute of Medicine and published by National Academies Press. This book was released on 1994-02-01 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt: The physiological or psychological stresses that employees bring to their workplace affect not only their own performance but that of their co-workers and others. These stresses are often compounded by those of the job itself. Medical personnel, firefighters, police, and military personnel in combat settingsâ€"among othersâ€"experience highly unpredictable timing and types of stressors. This book reviews and comments on the performance-enhancing potential of specific food components. It reflects the views of military and non-military scientists from such fields as neuroscience, nutrition, physiology, various medical specialties, and performance psychology on the most up-to-date research available on physical and mental performance enhancement in stressful conditions. Although placed within the context of military tasks, the volume will have wide-reaching implications for individuals in any job setting.

Caffeine in Food and Dietary Supplements

Author : Leslie A. Pray
Publisher :
ISBN 13 : 9780309297493
Total Pages : 0 pages
Book Rating : 4.2/5 (974 download)

DOWNLOAD NOW!

Book Synopsis Caffeine in Food and Dietary Supplements by : Leslie A. Pray

Download or read book Caffeine in Food and Dietary Supplements written by Leslie A. Pray and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Caffeine in Food and Dietary Supplements is the summary of a workshop convened by the Institute of Medicine in August 2013 to review the available science on safe levels of caffeine consumption in foods, beverages, and dietary supplements and to identify data gaps. Scientists with expertise in food safety, nutrition, pharmacology, psychology, toxicology, and related disciplines; medical professionals with pediatric and adult patient experience in cardiology, neurology, and psychiatry; public health professionals; food industry representatives; regulatory experts; and consumer advocates discussed the safety of caffeine in food and dietary supplements, including, but not limited to, caffeinated beverage products, and identified data gaps. Caffeine, a central nervous stimulant, is arguably the most frequently ingested pharmacologically active substance in the world. Occurring naturally in more than 60 plants, including coffee beans, tea leaves, cola nuts and cocoa pods, caffeine has been part of innumerable cultures for centuries. But the caffeine-in-food landscape is changing. There are an array of new caffeine-containing energy products, from waffles to sunflower seeds, jelly beans to syrup, even bottled water, entering the marketplace. Years of scientific research have shown that moderate consumption by healthy adults of products containing naturally-occurring caffeine is not associated with adverse health effects. The changing caffeine landscape raises concerns about safety and whether any of these new products might be targeting populations not normally associated with caffeine consumption, namely children and adolescents, and whether caffeine poses a greater health risk to those populations than it does for healthy adults. This report delineates vulnerable populations who may be at risk from caffeine exposure; describes caffeine exposure and risk of cardiovascular and other health effects on vulnerable populations, including additive effects with other ingredients and effects related to pre-existing conditions; explores safe caffeine exposure levels for general and vulnerable populations; and identifies data gaps on caffeine stimulant effects.

The Handbook of Stress Science

Author : Richard Contrada, PhD
Publisher : Springer Publishing Company
ISBN 13 : 0826117716
Total Pages : 672 pages
Book Rating : 4.8/5 (261 download)

DOWNLOAD NOW!

Book Synopsis The Handbook of Stress Science by : Richard Contrada, PhD

Download or read book The Handbook of Stress Science written by Richard Contrada, PhD and published by Springer Publishing Company. This book was released on 2010-09-29 with total page 672 pages. Available in PDF, EPUB and Kindle. Book excerpt: "[F]or those who are entering the field or who want to broaden their perspective, Ibelieve that this Handbook is indispensible. More than just a contribution to the field, theHandbook may well become a classic."--PsycCRITIQUES "The editors fully achieved their goal of producing a state-of-the-science stress reference for use by investigators, educators, and practitioners with clinical and health interests."--Psycho-Oncology "This is an important book about the scientific study of stress and human adaptation. It brings together both empirical data and theoretical developments that address the fundamental question of how psychosocial variables get inside the body to influence neurobiological processes that culminate in physical disease." From the Foreword by David C. Glass, PhD Emeritus Professor of Psychology Stony Brook University Edited by two leading health psychologists, The Handbook of Stress Science presents a detailed overview of key topics in stress and health psychology. With discussions on how stress influences physical health-including its effects on the nervous, endocrine, cardiovascular, and immune systems-the text is a valuable source for health psychologists, as well as researchers in behavioral medicine, neuroscience, genetics, clinical and social psychology, sociology, and public health. This state-of-the-art resource reviews conceptual developments, empirical findings, clinical applications, and investigative strategies and tools from the past few decades of stress research. It represents all major approaches to defining stress and describes the themes and developments that characterize the field of health-related stress research. The five sections of this handbook cover: Current knowledge regarding the major biological structures and systems that are involved in the stress response Social-contextual contributions to stress and to processes of adaptation to stress, including the workplace, socioeconomic status, and social support The concept of cognitive appraisal as it relates to stress and emotion psychological factors influencing stress such as, personality, gender, and adult development The evidence linking stress to health-related behaviors and mental and physical health outcomes Research methods, tools, and strategies, including the principles and techniques of both laboratory experimentation and naturalistic stress research

Cardiovascular Responses to Physical Stressors in Normotensive and Exercise Hypertensive Individuals

Author : Darren A. Johnson
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (872 download)

DOWNLOAD NOW!

Book Synopsis Cardiovascular Responses to Physical Stressors in Normotensive and Exercise Hypertensive Individuals by : Darren A. Johnson

Download or read book Cardiovascular Responses to Physical Stressors in Normotensive and Exercise Hypertensive Individuals written by Darren A. Johnson and published by . This book was released on 1995 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study compared the cardiovascular responses to the PWC 140, cold pressor test (CPT), and isometric hand grip (IHG), to evaluate the consistency in the blood pressure response among these physical stressors. Eighteen resting normotensive males were classified as either normotensive at exercise or exercise hypertensive on the basis of their blood pressure response to the first stage of the Canadian Aerobic Fitness Test (CAFT) for their age group. Subjects were administered a 6-min PWC 140 bicycle ergometer test, a 120 sec CPT (forearm and hand immersion), and a 120 sec IHG at 30% MVC. Systolic blood pressure (SBP), diastolic blood pressure (DBP), mean arterial pressure (MAP), heart rate (HR), stroke volume (SV), cardiac output (CO), and ejection fraction (EF) were recorded every 5 seconds during a one min resting period, during exercise, and for 3 min post exercise using a Finapress 2000 BP monitor and BoMed bioimpedance cardiac monitor. The results of this study indicate that: (1) there were no significant differences between the two groups for the cardiovascular responses to the PWC 140, IHG, and CPT with the exception of a greater CO and SV in normotensives on the PWC 140, and a higher HR in exercise hypertensives on the CPT; (2) the exercise hypertensives had a greater rate of increase in SBP and DBP than the normotensives over the first 90 seconds of the CPT; (3) there was no consistent pattern in the individual responses to the CAFT, CPT, and IHG with respect to $\Delta$SBP. It was concluded that within the context of this study, the blood pressure responses to dynamic exercise, isometric exercise, and cold stress were not consistent among the subjects and tests.

The Relaxation Response

Author : Herbert Benson, M.D.
Publisher : Harper Collins
ISBN 13 : 0061966002
Total Pages : 243 pages
Book Rating : 4.0/5 (619 download)

DOWNLOAD NOW!

Book Synopsis The Relaxation Response by : Herbert Benson, M.D.

Download or read book The Relaxation Response written by Herbert Benson, M.D. and published by Harper Collins. This book was released on 2009-09-22 with total page 243 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this time of quarantine and global uncertainty, it can be difficult to deal with the increased stress and anxiety. Using ancient self-care techniques rediscovered by Herbert Benson, M.D., a pioneer in mind/body medicine for health and wellness, you can relieve your stress, anxiety, and depression at home with just ten minutes a day. Herbert Benson, M.D., first wrote about a simple, effective mind/body approach to lowering blood pressure in The Relaxation Response. When Dr. Benson introduced this approach to relieving stress over forty years ago, his book became an instant national bestseller, which has sold over six million copies. Since that time, millions of people have learned the secret—without high-priced lectures or prescription medicines. The Relaxation Response has become the classic reference recommended by most health care professionals and authorities to treat the harmful effects of stress, anxiety, depression, and high blood pressure. Rediscovered by Dr. Benson and his colleagues in the laboratories of Harvard Medical School and its teaching hospitals, this revitalizing, therapeutic tack is now routinely recommended to treat patients suffering from stress and anxiety, including heart conditions, high blood pressure, chronic pain, insomnia, and many other physical and psychological ailments. It requires only minutes to learn, and just ten minutes of practice a day.

Psychobiology of Physical Activity

Author : Edmund O. Acevedo
Publisher : Human Kinetics
ISBN 13 : 9780736055369
Total Pages : 306 pages
Book Rating : 4.0/5 (553 download)

DOWNLOAD NOW!

Book Synopsis Psychobiology of Physical Activity by : Edmund O. Acevedo

Download or read book Psychobiology of Physical Activity written by Edmund O. Acevedo and published by Human Kinetics. This book was released on 2006 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: This title addresses psychobiologic factors and how they relate to sport and exercise. The authors summarise cutting edge research and provide researchers and scholars with the most up-to-date information.

Human Cardiovascular Control

Author : Loring B. Rowell
Publisher : Oxford University Press, USA
ISBN 13 : 9780195073621
Total Pages : 522 pages
Book Rating : 4.0/5 (736 download)

DOWNLOAD NOW!

Book Synopsis Human Cardiovascular Control by : Loring B. Rowell

Download or read book Human Cardiovascular Control written by Loring B. Rowell and published by Oxford University Press, USA. This book was released on 1993 with total page 522 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new analysis of reflex and hormonal control of the human cardiovascular system developed from questions raised in Human Circulation: During Physical Stress (Rowell, 1986) and from recent findings. The goal is to help students, physiologists and clinicians understand the control of pressure, vascular volume, and blood flow by examining the cardiovascular system during orthostasis and exercise, two stresses that most affect these variables. A discussion of the passive physical properties of the vascular system provides a basis for explaining how vascular control is modified by mechanical, neural, and humoral factors. Interactive effects of the vasculature on cardiac performance are emphasized; they reveal the importance of autonomic control, supplemented by muscle pumping, in maintaining adequate ventricular filling pressure. The author's detailed analysis of how total oxygen consumption is restricted focuses on limitations in cardiac pumping ability, oxygen diffusion from lungs to blood and from blood to active muscle, oxidative metabolism and neural control of organ blood flow. An unsolved mystery is the nature of the signals that govern the cardiovascular responses to exercise. This is discussed in a new and critical synthesis of ideas and evidence concerning the "error signals" that are sensed and then corrected by activation of the autonomic nervous system during exercise.