Adaptation To Prolonged Bedrest In Man
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Adaptation To Prolonged Bedrest In Man
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Author : John E. Greenleaf
language : en
Publisher:
Release Date : 1976
Adaptation To Prolonged Bedrest In Man written by John E. Greenleaf and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1976 with Adaptation (Physiology) categories.
Physiological Responses To Prolonged Bed Rest And Fluid Immersion In Man
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Author : John Edward Greenleaf
language : en
Publisher:
Release Date : 1982
Physiological Responses To Prolonged Bed Rest And Fluid Immersion In Man written by John Edward Greenleaf and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1982 with Adaptation (Physiology) categories.
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).
Physiological Responses To Prolonged Bed Rest In Humans A Compendium Of Research 1981 1988
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Author : Phuong B. Luu
language : en
Publisher:
Release Date : 1990
Physiological Responses To Prolonged Bed Rest In Humans A Compendium Of Research 1981 1988 written by Phuong B. Luu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with Adaptation (Physiology) categories.
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.
Exercise Countermeasures For Bed Rest Deconditioning
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Author : John Edward Greenleaf
language : en
Publisher:
Release Date : 1993
Exercise Countermeasures For Bed Rest Deconditioning written by John Edward Greenleaf and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with categories.
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.
Clinical Physiology Of Bed Rest
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Author : John Edward Greenleaf
language : en
Publisher:
Release Date : 1993
Clinical Physiology Of Bed Rest written by John Edward Greenleaf and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Bed rest categories.
Biological And Medical Research In Space
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Author : David Moore
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Biological And Medical Research In Space written by David Moore and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
Life Science studies in space were initially driven by the need to explore how man could survive spaceflight conditions; the effects of being launched un der high accelerations, exposed to weightlessness and radiation for different periods of time, and returned to Earth in safety. In order to substantiate the detailed knowledge of potentially adverse effects, many model experiments were launched using organisms which ranged from bacteria, plants, inverte brates, rodents and primates through to man. Although no immediate life threatening effects were found, these experiments can be considered today as the precursors to life science research in space. Many unexplained effects on these life forms were attributed to the condition of weightlessness. Most of them were poorly recorded, poorly published, or left simply with anecdotal information. Only with the advent of Skylab, and later Spacelab, did the idea emerge, and indeed the infrastructure permit, weightlessness to be considered as an ex tended tool for research into some fundamental mechanisms or processes as sociated with the effect of gravity on organisms at all levels. The initial hy pothesis to extrapolate from hypergravity through 1 x g to near 0 x g effects could no longer be retained, since many of the experiment results were seen to contradict the models or theories in the current textbooks of biology and physiology. The past decade has been dedicated primarily to exploratory research.
Nasa Technical Memorandum
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Author :
language : en
Publisher:
Release Date : 1992
Nasa Technical Memorandum written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Aeronautics categories.
Nasa Reference Publication
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Author :
language : en
Publisher:
Release Date : 1979
Nasa Reference Publication written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1979 with Astronautics categories.
Human Adaptation To Spaceflight
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Author : Government Publishing Office
language : en
Publisher: Government Printing Office
Release Date : 2014-12-15
Human Adaptation To Spaceflight written by Government Publishing Office and has been published by Government Printing Office this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-12-15 with categories.
Human Adaptation to Spaceflight: The Role of Nutrition reflects a (brief) review of the history of and current state of knowledge about the role of nutrition in human space flight. We have attempted to morganize this from a more physiological point of view, and to highlight systems, and the nutrients that support them, rather than the other way around. We hope we have captured in this book the state of the field of study of the role of human nutrition in space flight, along with the work leading up to this state, and some guideposts for work remaining to be done and gaps that need to be filled. NOTE: NO FURTHER DISCOUNTS FOR ALREADY REDUCED SALE ITEMS.
Fitness Cycling
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Author : Brian J. Sharkey
language : en
Publisher: Human Kinetics
Release Date : 2013
Fitness Cycling written by Brian J. Sharkey and has been published by Human Kinetics this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with Education categories.
Grade level: 9, 10, 11, 12, s, t.