Changes in Systolic Blood Pressure During Isometric Contractions of Different Size Muscle Groups PDF Download
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Author: Joe A. Buck
Publisher:
ISBN:
Category : Blood pressure
Languages : en
Pages : 260
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Book Description
The systolic blood pressure responses to sustained 40% maximal voluntary index finger adduction and handgrip contractions were characterized for 21 male subjects. Using the systolic blood pressure measurements and the corresponding times at which they were taken, regression lines were calculated which illustrated the changes in systolic pressure with respect to time. The slope of the regression line representing the mean response to the larger muscle mass (.287) was significantly steeper (p less than .001) than that for the smaller mass (.052). The literature reviewed prior to conducting this study suggested that the systolic blood pressure response to isometric exercise is dependent on percent of maximal voluntary strength and independent of the size of the contracting muscle mass. The results of this study indicated that the size of the contracting muscle mass does influence the systolic blood pressure response to a sustained isometric contraction. (Author).
Author: Joe A. Buck
Publisher:
ISBN:
Category : Blood pressure
Languages : en
Pages : 260
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Book Description
The systolic blood pressure responses to sustained 40% maximal voluntary index finger adduction and handgrip contractions were characterized for 21 male subjects. Using the systolic blood pressure measurements and the corresponding times at which they were taken, regression lines were calculated which illustrated the changes in systolic pressure with respect to time. The slope of the regression line representing the mean response to the larger muscle mass (.287) was significantly steeper (p less than .001) than that for the smaller mass (.052). The literature reviewed prior to conducting this study suggested that the systolic blood pressure response to isometric exercise is dependent on percent of maximal voluntary strength and independent of the size of the contracting muscle mass. The results of this study indicated that the size of the contracting muscle mass does influence the systolic blood pressure response to a sustained isometric contraction. (Author).
Author: Ronald J. Korthuis
Publisher: Morgan & Claypool Publishers
ISBN: 1615041834
Category : Medical
Languages : en
Pages : 147
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Book Description
The aim of this treatise is to summarize the current understanding of the mechanisms for blood flow control to skeletal muscle under resting conditions, how perfusion is elevated (exercise hyperemia) to meet the increased demand for oxygen and other substrates during exercise, mechanisms underlying the beneficial effects of regular physical activity on cardiovascular health, the regulation of transcapillary fluid filtration and protein flux across the microvascular exchange vessels, and the role of changes in the skeletal muscle circulation in pathologic states. Skeletal muscle is unique among organs in that its blood flow can change over a remarkably large range. Compared to blood flow at rest, muscle blood flow can increase by more than 20-fold on average during intense exercise, while perfusion of certain individual white muscles or portions of those muscles can increase by as much as 80-fold. This is compared to maximal increases of 4- to 6-fold in the coronary circulation during exercise. These increases in muscle perfusion are required to meet the enormous demands for oxygen and nutrients by the active muscles. Because of its large mass and the fact that skeletal muscles receive 25% of the cardiac output at rest, sympathetically mediated vasoconstriction in vessels supplying this tissue allows central hemodynamic variables (e.g., blood pressure) to be spared during stresses such as hypovolemic shock. Sympathetic vasoconstriction in skeletal muscle in such pathologic conditions also effectively shunts blood flow away from muscles to tissues that are more sensitive to reductions in their blood supply that might otherwise occur. Again, because of its large mass and percentage of cardiac output directed to skeletal muscle, alterations in blood vessel structure and function with chronic disease (e.g., hypertension) contribute significantly to the pathology of such disorders. Alterations in skeletal muscle vascular resistance and/or in the exchange properties of this vascular bed also modify transcapillary fluid filtration and solute movement across the microvascular barrier to influence muscle function and contribute to disease pathology. Finally, it is clear that exercise training induces an adaptive transformation to a protected phenotype in the vasculature supplying skeletal muscle and other tissues to promote overall cardiovascular health. Table of Contents: Introduction / Anatomy of Skeletal Muscle and Its Vascular Supply / Regulation of Vascular Tone in Skeletal Muscle / Exercise Hyperemia and Regulation of Tissue Oxygenation During Muscular Activity / Microvascular Fluid and Solute Exchange in Skeletal Muscle / Skeletal Muscle Circulation in Aging and Disease States: Protective Effects of Exercise / References
Author: David Jordan
Publisher: Ashgate Publishing
ISBN: 9781855780248
Category : Medical
Languages : en
Pages : 159
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Book Description
The Studies in Physiology series provides a concise introduction to developments in complex areas of physiology for a wide audience. Published on behalf of the Physiology Society, Cardiovascular Regulation provides an up-to-date account of our current understanding of the control of the cardiovascular system that is not covered by existing textbooks. Both students and lecturers of cardiovascular and exercise physiology, medicine, dentistry and biomedical sciences will find this book informative and easy to read. Each chapter has numerous summary boxes. 'Essential reading' suggestions provide additional reading for undergraduates and the suggestions for 'Further reading' cover the subject to postgraduate level.
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 200
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Book Description
Author: Institute of Medicine
Publisher: National Academies Press
ISBN: 0309132991
Category : Business & Economics
Languages : en
Pages : 510
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Book Description
Every year workers' low-back, hand, and arm problems lead to time away from jobs and reduce the nation's economic productivity. The connection of these problems to workplace activities-from carrying boxes to lifting patients to pounding computer keyboards-is the subject of major disagreements among workers, employers, advocacy groups, and researchers. Musculoskeletal Disorders and the Workplace examines the scientific basis for connecting musculoskeletal disorders with the workplace, considering people, job tasks, and work environments. A multidisciplinary panel draws conclusions about the likelihood of causal links and the effectiveness of various intervention strategies. The panel also offers recommendations for what actions can be considered on the basis of current information and for closing information gaps. This book presents the latest information on the prevalence, incidence, and costs of musculoskeletal disorders and identifies factors that influence injury reporting. It reviews the broad scope of evidence: epidemiological studies of physical and psychosocial variables, basic biology, biomechanics, and physical and behavioral responses to stress. Given the magnitude of the problem-approximately 1 million people miss some work each year-and the current trends in workplace practices, this volume will be a must for advocates for workplace health, policy makers, employers, employees, medical professionals, engineers, lawyers, and labor officials.
Author: Dr.Hande Turker
Publisher: BoD – Books on Demand
ISBN: 9535111183
Category : Medical
Languages : en
Pages : 326
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Book Description
Utilization of electrodiagnosis; namely electromyography (EMG), nerve conduction studies, late responses, repetitive nerve stimulation techniques, quantitative EMG and evoked potentials, has long been discussed in many text books as basic principles. However the usage of electroneuromyography is rather new in some aspects when compared with tasks of daily practise. This book, we believe, will cover and enlighten those aspects where electrodiagnosis has begun to play important roles nowadays.
Author: Physiological Society (Great Britain)
Publisher: Ashgate Publishing
ISBN:
Category : Medical
Languages : en
Pages : 200
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Book Description
This work describes the physiological and biochemical responses to exercise. It examines the nature of the fatigue process and the adaptations which occur in response to training and how these responses are influenced by a variety of environmental factors.
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: Peter Kokkinos
Publisher: Springer
ISBN: 3030048160
Category : Medical
Languages : en
Pages : 442
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Book Description
This book examines the links between physical activity (PA), cardiorespiratory fitness (CRF), and cardiovascular and metabolic diseases. It presents an overview of the role of PA and CRF in the prevention and management of risk factors associated with cardiometabolic diseases such as hypertension, peripheral vascular disease, stroke, type 2 diabetes, metabolic syndrome, dyslipidemia, obesity, and atherosclerosis. In addition, it explores how these risks vary with different populations such as the elderly and people of various racial backgrounds. The book also highlights risks associated with exercise and presents a prescription for appropriate and efficacious exercise to minimize risk and maximize health benefits for the heart. Cardiorespiratory Fitness in Prevention and Management of Cardiometabolic Disease is an essential resource for physicians, exercise physiologists, medical students, residents, fellows, nurses, and researchers in cardiology, cardiorespiratory fitness, exercise science, health promotion and disease prevention, public health, and epidemiology.
Author: John A. Downey
Publisher: Butterworth-Heinemann
ISBN: 1483193993
Category : Medical
Languages : en
Pages : 785
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Book Description
The Physiological Basis of Rehabilitation Medicine: Second Edition presents a comprehensive examination of the management of patients with functional impairments due to disease or trauma. It discusses the distinction between disabilities and impairments per se. It addresses the method in which the human body adapts and compensates for the stress produced by physical injuries. Some of the topics covered in the book are the physiology of cerebellum and basal ganglia; description of upper and lower motor neurons; anatomy of the vascular supply to the brain; characteristics of the autonomic nervous system; structure, chemistry, and function of skeletal muscle; the receptors in muscle; and cardiopulmonary physiology. The role of muscle spindles in perception of limb position and movement is fully covered. An in-depth account of the physiology of synovial joints and articular cartilage are provided. The cellular and glandular components of the skin are completely presented. A chapter is devoted to the factors involve in wound healing. Another section focuses on the nerve conduction and neuromuscular transmission. The book can provide useful information to doctors, dermatologists, students, and researchers.
