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Acceleration Tolerance Effect Of Exercise Acceleration Training Bed Rest And Weightlessness Deconditioning A Compendium Of Research 1950 1996
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Book Synopsis Acceleration Tolerance by : J. L. Chou
Download or read book Acceleration Tolerance written by J. L. Chou and published by . This book was released on 1997 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: This compendium includes abstracts and annotations of clinical observations and of more basic studies involving physiological mechanisms concerning interaction of acceleration, training and deconditioning. If the author's abstract or summary was appropriate, it was included. In other cases a more detailed annotation of the paper was prepared under the subheadings Purpose, Methods, Results, and Conclusions. Author and keyword indices are provided, plus an additional selected bibliography of related work and of those papers received after the volume was prepared for publication. This volume includes material published from 1950-1996.
Book Synopsis Acceleration Tolerance: Effect of Exercise, Acceleration Training; Bed Rest and Weightlessness Deconditioning. A Compendium of Research (1950-1996) by :
Download or read book Acceleration Tolerance: Effect of Exercise, Acceleration Training; Bed Rest and Weightlessness Deconditioning. A Compendium of Research (1950-1996) written by and published by . This book was released on 1997 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Exercise Physiology by : William McArdle
Download or read book Exercise Physiology written by William McArdle and published by Lippincott Williams & Wilkins. This book was released on 2023-04-05 with total page 3461 pages. Available in PDF, EPUB and Kindle. Book excerpt: With a legacy spanning more than 40 years, Exercise Physiology: Nutrition, Energy, and Human Performance has helped nearly half a million students and exercise science practitioners build a solid foundation in the scientific principles underlying modern exercise physiology. This widely praised, trendsetting text presents a research-centric approach in a vibrant, engaging design to make complex topics accessible and deliver a comprehensive understanding of how nutrition, energy transfer, and exercise training affect human performance. The extensively updated 9th Edition reflects the latest advances in the field as well as a rich contextual perspective to ensure readiness for today’s clinical challenges.
Book Synopsis Exercise Countermeasures for Bed-rest Deconditioning by : John Edward Greenleaf
Download or read book Exercise Countermeasures for Bed-rest Deconditioning written by John Edward Greenleaf and published by . This book was released on 1993 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Muscle Function and the Space Flight Environments of Weightlessness and Acceleration by : Stanley J. Myers
Download or read book Muscle Function and the Space Flight Environments of Weightlessness and Acceleration written by Stanley J. Myers and published by . This book was released on 1968 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: Little is known about the effects of prolonged weightlessness and acceleration on the muscular system. This survey reviews basic muscle physiology and discusses the possible effects of these space flight stresses on muscle function. Anatomical, biochemical, and electrophysiological methods for evaluating the state of the muscular system are reviewed. A selected annotated bibliography concerned with the effects of weightlessness and acceleration on muscle is also included. (Author).
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781723573774 Total Pages :232 pages Book Rating :4.5/5 (737 download)
Book Synopsis Exercise Countermeasures for Bed-Rest Deconditioning by : National Aeronautics and Space Administration (NASA)
Download or read book Exercise Countermeasures for Bed-Rest Deconditioning written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-25 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 working capacity (peak oxygen uptake), muscular strength and endurance, and on orthostatic tolerance, posture and gait. Other data were collected on muscle atrophy, bone mineralization and density, endocrine analyses concerning vasoactivity and fluid-electrolyte balance, muscle intermediary metabolism, and on performance and mood of the subjects. It was concluded that: The subjects maintained a relatively stable mood, high morale, and high esprit de corps throughout the study. Performance improved in nearly all tests in almost all the subjects. Isotonic training, as opposed to isokinetic exercise training, was associated more with decreasing levels of psychological tension, concentration, and motivation; and improvement in the quality of sleep. Working capacity (peak oxygen uptake) was maintained during bed rest with isotonic exercise training; it was not maintained with isokinetic or no exercise training. In general, there was no significant decrease in strength or endurance of arm or leg muscles during bed rest, in spite of some reduction in muscle size (atrophy) of some leg muscles. There was no effect of isotonic exercise training on orthostasis, since tilt-table tolerance was reduced similarly in all three groups following bed rest. 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. Most pre-bed rest responses were restored by the fourth day of recovery. Greenleaf, John (Editor) Ames Research Center NASA-TM-103987, A-93008, NAS 1.15:103987 RTOP 199-21-12-07...
Book Synopsis The Duration of Tolerance to Positive Acceleration by : Hugh Miller
Download or read book The Duration of Tolerance to Positive Acceleration written by Hugh Miller and published by . This book was released on 1958 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Human tolerance to prolonged positive (headward) accelerations of sub-blackout magnitude has been investigated in this study. The data indicate that man is able to withstand the forces of positive g for durations much longer than previously supposed. Exposures as long as an hour at 3.0 g appear well tolerated by most subjects. Except for moderate tachycardia no pathologic abnormalities were observed in the electrocardiographic tracings recorded continuously on all subjects. Explored were the durations of tolerance at g levels varying from 3.0 to 6.0 g. The effects of anti-g suits upon tolerance are also reported."--Abstract.
Book Synopsis Deconditioning and Reconditioning by : John Greenleaf
Download or read book Deconditioning and Reconditioning written by John Greenleaf and published by CRC Press. This book was released on 2004-02-11 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: Deconditioning is an integrated physiological response of the body to a reduction in metabolic rate, that is, to a reduction in energy use or in exercise level. Deconditioning and Reconditioning presents selected background information on the many aspects of ground-based and in-flight physiological research and applications. This multi-auth
Book Synopsis Effect of Age, Occupation, and Physical Training on Human Tolerance to Long-Term Acceleration by : P. M. Suvorov
Download or read book Effect of Age, Occupation, and Physical Training on Human Tolerance to Long-Term Acceleration written by P. M. Suvorov and published by . This book was released on 1989 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effect of the age, occupation and physical training on the human tolerance to long term accelerations was investigated. 427 test subjects - fighter pilots, engineers, physicians and research workers were used in the experiments. The lowest tolerance was found in the test subjects of the age range of 20-24 while the highest in those of 30-34. The test subject of 40-49 showed a decreased tolerance to accelerations. Certain differences in the acceleration tolerance and pattern of physiological reactions were found between pilots and representatives of other professions. As to the sportsmen, gymnasts, weight-lifters and acrobats they exhibited a better tolerance as compared to long-distance runners, football players and skiers who showed the tolerance level similar to that of people who did not go in for sports regularly. Keywords: Aviation medicine; Acceleration tolerance; Astronauts. (kt).
Book Synopsis Physiological Responses of Women to Simulated Weightlessness: A Review of the First Female Bed-rest Study by :
Download or read book Physiological Responses of Women to Simulated Weightlessness: A Review of the First Female Bed-rest Study written by and published by . This book was released on 1978 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781725629936 Total Pages :30 pages Book Rating :4.6/5 (299 download)
Book Synopsis Cycle-Powered Short Radius (1.9 M) Centrifuge by : National Aeronautics and Space Administration (NASA)
Download or read book Cycle-Powered Short Radius (1.9 M) Centrifuge written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-08-17 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: In addition to extensive use of lower extremity physical exercise training as a countermeasure for the work capacity component of spaceflight deconditioning, some form of additional head-to-foot (+Gz) gravitational (orthostatic) stress may be required to further attenuate or prevent the signs and symptoms (nausea, vertigo, instability, fatigue) of the general reentry syndrome (GRS) that can reduce astronaut performance during landing. Orthostatic (head-to-foot) stress can be induced by standing, by lower body negative pressure, and by +Gz acceleration. One important question is whether acceleration training alone or with concurrent leg exercise would provide sufficient additive stimulation to attenuate the GRS. Use of a new human-powered centrifuge may be the answer. Thus, the purpose for this study was to compare heart rate (HR), i.e., a stress response during human-powered acceleration, in four men (35-62 yr) and two women (30-31 yr) during exercise acceleration versus passive acceleration (by an off-board operator) at 100% (maximal acceleration = A(max)), and at 25%, 50%, and 75% of A(max). Mean (+/-SE) A(max) was 43.7 +/- 1.3 rpm (+3.9 +/- 0.2Gz). Mean HR at exercise A(max) was 189 +/- 13 b/min (50-70 sec run time), and 142 +/- 22 b/min at passive A(max) (40-70 sec run time). Regression of mean HR on the various +Gz levels indicated explained variance (correlations squared) of r(exp 2) = 0.88 (exercise) and r(exp 2) = 0.96 (passive): exercise HR of 107 +/- 4 (25%) to 189 +/- 13 (100%) b/min were 43-50 b/min higher (p less than 0.05) than comparable passive HR of 64 +/- 2 to 142 +/- 22 b/min. Thus, exercise adds significant physiological stress during +Gz acceleration. Inflight use of this combined exercise and acceleration countermeasure may maintain work capacity as well as normalize acceleration and orthostatic tolerances which could attenuate or perhaps eliminate the GRS. Greenleaf, J. E. and Gundo, D. P. and Watenpaugh, D. E. and Mulenburg, G. M. and Mckenzi...
Book Synopsis The Effects of Bed Rest on Crew Performance During Simulated Shuttle Reentry: Study overview and physiological results by :
Download or read book The Effects of Bed Rest on Crew Performance During Simulated Shuttle Reentry: Study overview and physiological results written by and published by . This book was released on 1974 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Human Body and Weightlessness by : William Thornton
Download or read book The Human Body and Weightlessness written by William Thornton and published by Springer. This book was released on 2017-10-11 with total page 331 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on all of the major problems associated with the absence of body weight in space, by analyzing effects, adaption, and re-adaptation upon returning to Earth, using sound scientific principles embedded in a historical context. Serious problems for space travelers range from Space Motion Sickness (SMS) to recently discovered ocular effects that may permanently impair vision. Fluid loss and shifts, spinal changes, and bone and muscle loss are also all results of weightlessness. Starting with a brief definition and history of weightlessness, the authors then address in detail each problem as well as the countermeasures aimed at alleviating them. In some cases, alternative hypotheses regarding what can and should be attempted are also presented. As plans for long-term missions to the Moon and Mars develop, it will be essential to find countermeasures to weightlessness that are effective for missions that could span years.
Book Synopsis The Effect of Head and Body Position on +Gz Acceleration Tolerance by : A. Tong
Download or read book The Effect of Head and Body Position on +Gz Acceleration Tolerance written by A. Tong and published by . This book was released on 1994 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Deconditioning and Reconditioning by : John E. Greenleaf
Download or read book Deconditioning and Reconditioning written by John E. Greenleaf and published by BiblioGov. This book was released on 2013-06 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: The NASA Technical Reports Servcr (NTRS) houses half a million publications that are a valuable means of information to researchers, teachers, students, and the general public. These documents are all aerospace related with much scientific and technical information created or funded by NASA. Some types of documents include conference papers, research reports, meeting papers, journal articles and more. This is one of those documents.
Book Synopsis Recapturing a Future for Space Exploration by : National Research Council
Download or read book Recapturing a Future for Space Exploration written by National Research Council and published by National Academies Press. This book was released on 2012-01-30 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt: More than four decades have passed since a human first set foot on the Moon. Great strides have been made in our understanding of what is required to support an enduring human presence in space, as evidenced by progressively more advanced orbiting human outposts, culminating in the current International Space Station (ISS). However, of the more than 500 humans who have so far ventured into space, most have gone only as far as near-Earth orbit, and none have traveled beyond the orbit of the Moon. Achieving humans' further progress into the solar system had proved far more difficult than imagined in the heady days of the Apollo missions, but the potential rewards remain substantial. During its more than 50-year history, NASA's success in human space exploration has depended on the agency's ability to effectively address a wide range of biomedical, engineering, physical science, and related obstacles-an achievement made possible by NASA's strong and productive commitments to life and physical sciences research for human space exploration, and by its use of human space exploration infrastructures for scientific discovery. The Committee for the Decadal Survey of Biological and Physical Sciences acknowledges the many achievements of NASA, which are all the more remarkable given budgetary challenges and changing directions within the agency. In the past decade, however, a consequence of those challenges has been a life and physical sciences research program that was dramatically reduced in both scale and scope, with the result that the agency is poorly positioned to take full advantage of the scientific opportunities offered by the now fully equipped and staffed ISS laboratory, or to effectively pursue the scientific research needed to support the development of advanced human exploration capabilities. Although its review has left it deeply concerned about the current state of NASA's life and physical sciences research, the Committee for the Decadal Survey on Biological and Physical Sciences in Space is nevertheless convinced that a focused science and engineering program can achieve successes that will bring the space community, the U.S. public, and policymakers to an understanding that we are ready for the next significant phase of human space exploration. The goal of this report is to lay out steps and develop a forward-looking portfolio of research that will provide the basis for recapturing the excitement and value of human spaceflight-thereby enabling the U.S. space program to deliver on new exploration initiatives that serve the nation, excite the public, and place the United States again at the forefront of space exploration for the global good.
Book Synopsis Physiological Response to Prolonged Bed Rest and Fluid Immersion in Man by : John E. Greenleaf
Download or read book Physiological Response to Prolonged Bed Rest and Fluid Immersion in Man written by John E. Greenleaf and published by . This book was released on 1982 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:
