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Author: John Edward Greenleaf
Publisher:
ISBN:
Category : Adaptation (Physiology)
Languages : en
Pages : 120
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Book Description
Water immersion and prolonged bed rest reproduce nearly all the physiological responses observed in astronauts in the weightless state. Moreover, it appears that relative to actual weightlessness, given responses tend to occur sooner in immersion and later in bed rest. Much research has been conducted on humans using these two techniques, especially by Russian scientists. This compendium contains abstracts and annotations of reports that appeared in the literature from January 1974 through December 1980. Two other related compendia have been published: Adaptation to Prolonged Bed Rest in Man: A Compendium of Research, by J.E. Greenleaf, C.J. Greenleaf, D. Van Derveer, and K.J. Dorchak (NASA TM X-3307, 1976); and Physiologic Responses to Water Immersion in Man: A Compendium of Research, by J. Kollias, D. Van Derveer, K.J. Dorchak, and J.E. Greenleaf (NASA TM X-3308, 1976).
Author: John Edward Greenleaf
Publisher:
ISBN:
Category : Adaptation (Physiology)
Languages : en
Pages : 120
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Book Description
Water immersion and prolonged bed rest reproduce nearly all the physiological responses observed in astronauts in the weightless state. Moreover, it appears that relative to actual weightlessness, given responses tend to occur sooner in immersion and later in bed rest. Much research has been conducted on humans using these two techniques, especially by Russian scientists. This compendium contains abstracts and annotations of reports that appeared in the literature from January 1974 through December 1980. Two other related compendia have been published: Adaptation to Prolonged Bed Rest in Man: A Compendium of Research, by J.E. Greenleaf, C.J. Greenleaf, D. Van Derveer, and K.J. Dorchak (NASA TM X-3307, 1976); and Physiologic Responses to Water Immersion in Man: A Compendium of Research, by J. Kollias, D. Van Derveer, K.J. Dorchak, and J.E. Greenleaf (NASA TM X-3308, 1976).
Author: Phuong B. Luu
Publisher:
ISBN:
Category : Adaptation (Physiology)
Languages : en
Pages : 148
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Book Description
This compendium summarizes published results of clinical observations and of more basic studies that help to elucidate the physiological mechanisms of adaptation of humans to prolonged bed rest. If the authors' abstract or summary was appropriate, it was included. In some cases a more detailed synopsis is provided, under the subheadings Purpose, Methods, Results, and Conclusions. This volume includes material published from 1981 through 1988.
Author: A. Mital
Publisher: Elsevier
ISBN: 0080531229
Category : Technology & Engineering
Languages : en
Pages : 491
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Book Description
There is an urgent need to disseminate ergonomics "know-how" to the work place. This book meets that need by providing clear guidelines and problem solving recommendations to assist the practitioner in decisions that directly protect the health, safety and well-being of the worker.The guidelines have evolved from a series of symposia on Ergonomic Guidelines and Problem Solving. Initially experts in each area selected were asked to write draft guidelines. These guidelines were circulated to participants at the symposia and to other experts for review before being comprehensively revised. In some instances these guidelines cannot be considered complete but it is important now to put some recommendations forward as guidelines. It is hoped that as new research emerges each guideline will be updated.Each guideline has been divided into two parts. Part I contains the guidelines for the practitioner and Part II provides the scientific basis or the knowledge for the guide. Such separation of the applied and theoretical content was designed to facilitate rapid incorporation of the guide into practice.The target audience for this book is the practitioner. The practitioner may be a manager, production system designer, shop supervisor, occupational health and safety professional, union representative, labor inspector or production engineer. For each of the guidelines, relevant practitioners are described.Topics covered include work space design, tool design, work-rest schedules, illumination and maintenance.
Author:
Publisher:
ISBN:
Category : Medicine
Languages : en
Pages : 1636
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Book Description
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1056
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Author: John Edward Greenleaf
Publisher:
ISBN:
Category :
Languages : en
Pages : 234
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Book Description
The purpose for this 30-day bed-rest study was to investigate the effects of short-term, high-intensity isotonic and isokinetic exercise training on maintenance of aerobic work capacity (peak oxygen uptake); muscular strength and endurance; and orthostatic tolerance, equilibrium, and gait. Other data were collected on muscle atrophy, bone mineralization and density, endocrine analyses of vasoactivity and fluid-electrolyte balance, muscle intermediary metabolism, and performance and mood of the subjects. Nineteen men (32-42 yr) were allocated into three groups: no-exercise control (peak oxygen uptake and isokinetic tests once/wk, N = 5), isotonic exercise training (electronic Quinton ergometer, supine, N = 7), and isokinetic exercise training (electronic Lido ergometer, supine, N = 7). The exercise training regimens were conducted near peak levels for 30 min in the morning and 30 min in the afternoon 5 d/wk. The protocol consisted of a 7-d ambulatory control period during which the subjects equilibrated on the standardized diet, 30 d of 6 degrees head-down bed rest, and a final 4.5 d of ambulatory recovery. Their diet consisted of commonly available fresh and frozen foods; mean caloric consumption of 2,678 +/- SE 75 kcal/d (control), 2,833 +/- SE 82 kcal/day (isotonic), and 2,890 +/- SE 75 kcal/d (isokinetic) resulted in mean weight losses during bed rest of 1.01 kg, 0.85 kg, and 0.0 kg, respectively. The results indicated that: (1) The subjects maintained a relatively stable mood, high morale, and high esprit de corps throughout the study. Scores improved in nearly all performance and mood tests in almost all the subjects. Isotonic training, as opposed to isokinetic exercise training, was associated with decreasing levels of psychological tension, concentration, and motivation, and with improvement in the quality of sleep. (2) Peak oxygen uptake was maintained during bed rest with isotonic exercise training; it was not maintained as well with isokinetic ( -9.0%) or no-exercise ( -18.2%) training. If a 9% reduction in aerobic power is acceptable, isokinetic exercise training could be used for maintenance of strength, endurance, and the reduced aerobic capacity in astronauts during flight. (3) In general, there were few decreases in strength or endurance of arm or leg muscles during bed rest, in spite of reduction in size (atrophy) of some leg muscles. (4) There was no effect of isotonic or isokinetic exercise training on orthostasis, because tilt-table tolerances were reduced similarly from 42-53 min to 30-34 min in the three groups following bed rest. (5) Bed rest resulted in significant decreases of postural stability and self-selected step length, stride length, and walking velocity, which were not influenced by either exercise training regimen. Pre-bed-rest responses were restored by the fourth day of recovery.
Author:
Publisher:
ISBN:
Category : Exercise
Languages : en
Pages : 988
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Book Description
Consists of citations selected from those contained in the National Library of Medicine's Medical Literature Analysis and Retrieval System.
Author: Thomas F.H. Schmidt
Publisher: Springer Science & Business Media
ISBN: 3662027488
Category : Medical
Languages : en
Pages : 413
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Book Description
Although it is widely recognized that there are significant variations in the circulation throughout the 24-hour day, these patterns have often been conceived as nuisance variables rather than functional differences. Responses of the circulation are examined here not as stable phenomena, but as integrated functions highly sensitive to environmental conditions, and driven by internal and external pacesetters. In this volume, cardiologists with a primary interest in hypertension or heart disease, chronobiologists, and psychologists join together for the first time to give the reader the opportunity to learn the extent and clinical significance of these changes from a chronobiological, behavioral and physiological perspective.
Author: Irene D. Turpie
Publisher: Springer Science & Business Media
ISBN: 1441988653
Category : Medical
Languages : en
Pages : 242
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Book Description
Aging Issues in Cardiology provides an overview of the practical clinical areas involved in managing cardiovascular disease in the elderly. This volume will be useful to any physician managing the cardiovascular health of elderly individuals. Topics covered include: -Delirium in Elderly Cardiac Patients, -Depression, - Pharmacologic Issues, - Primary Prevention, - Syncope, - Heart Failure, - Coronary Revascularization.
Author: Nandu Goswami
Publisher: Frontiers Media SA
ISBN: 2889632733
Category :
Languages : en
Pages : 406
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Book Description
