Download or read book The Effect of Various Durations of Active Recovery on Total and Peak Power Output of Consecutive Cycle Ergometer Tests written by Barbara Ellen Ainsworth and published by . This book was released on 1987 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1987 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Index to American Doctoral Dissertations written by and published by . This book was released on 1986 with total page 606 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Training Intensity Volume and Recovery Distribution Among Elite and Recreational Endurance Athletes written by Thomas L. Stöggl and published by Frontiers Media SA. This book was released on 2019-09-20 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High Intensity Exercise in Hypoxia Beneficial Aspects and Potential Drawbacks written by Olivier Girard and published by Frontiers Media SA. This book was released on 2018-01-25 with total page 169 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the past, ‘traditional’ moderate-intensity continuous training (60-75% peak heart rate) was the type of physical activity most frequently recommended for both athletes and clinical populations (cf. American College of Sports Medicine guidelines). However, growing evidence indicates that high-intensity interval training (80-100% peak heart rate) could actually be associated with larger cardiorespiratory fitness and metabolic function benefits and, thereby, physical performance gains for athletes. Similarly, recent data in obese and hypertensive individuals indicate that various mechanisms – further improvement in endothelial function, reductions in sympathetic neural activity, or in arterial stiffness – might be involved in the larger cardiovascular protective effects associated with training at high exercise intensities. Concerning hypoxic training, similar trends have been observed from ‘traditional’ prolonged altitude sojourns (‘Live High Train High’ or ‘Live High Train Low’), which result in increased hemoglobin mass and blood carrying capacity. Recent innovative ‘Live Low Train High’ methods (‘Resistance Training in Hypoxia’ or ‘Repeated Sprint Training in Hypoxia’) have resulted in peripheral adaptations, such as hypertrophy or delay in muscle fatigue. Other interventions inducing peripheral hypoxia, such as vascular occlusion during endurance/resistance training or remote ischemic preconditioning (i.e. succession of ischemia/reperfusion episodes), have been proposed as methods for improving subsequent exercise performance or altitude tolerance (e.g. reduced severity of acute-mountain sickness symptoms). Postulated mechanisms behind these metabolic, neuro-humoral, hemodynamics, and systemic adaptations include stimulation of nitric oxide synthase, increase in anti-oxidant enzymes, and down-regulation of pro-inflammatory cytokines, although the amount of evidence is not yet significant enough. Improved O2 delivery/utilization conferred by hypoxic training interventions might also be effective in preventing and treating cardiovascular diseases, as well as contributing to improve exercise tolerance and health status of patients. For example, in obese subjects, combining exercise with hypoxic exposure enhances the negative energy balance, which further reduces weight and improves cardio-metabolic health. In hypertensive patients, the larger lowering of blood pressure through the endothelial nitric oxide synthase pathway and the associated compensatory vasodilation is taken to reflect the superiority of exercising in hypoxia compared to normoxia. A hypoxic stimulus, in addition to exercise at high vs. moderate intensity, has the potential to further ameliorate various aspects of the vascular function, as observed in healthy populations. This may have clinical implications for the reduction of cardiovascular risks. Key open questions are therefore of interest for patients suffering from chronic vascular or cellular hypoxia (e.g. work-rest or ischemia/reperfusion intermittent pattern; exercise intensity; hypoxic severity and exposure duration; type of hypoxia (normobaric vs. hypobaric); health risks; magnitude and maintenance of the benefits). Outside any potential beneficial effects of exercising in O2-deprived environments, there may also be long-term adverse consequences of chronic intermittent severe hypoxia. Sleep apnea syndrome, for instance, leads to oxidative stress and the production of reactive oxygen species, and ultimately systemic inflammation. Postulated pathophysiological changes associated with intermittent hypoxic exposure include alteration in baroreflex activity, increase in pulmonary arterial pressure and hematocrit, changes in heart structure and function, and an alteration in endothelial-dependent vasodilation in cerebral and muscular arteries. There is a need to explore the combination of exercising in hypoxia and association of hypertension, developmental defects, neuro-pathological and neuro-cognitive deficits, enhanced susceptibility to oxidative injury, and possibly increased myocardial and cerebral infarction in individuals sensitive to hypoxic stress. The aim of this Research Topic is to shed more light on the transcriptional, vascular, hemodynamics, neuro-humoral, and systemic consequences of training at high intensities under various hypoxic conditions.
Download or read book Comprehensive Dissertation Index written by and published by . This book was released on 1989 with total page 780 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effect of Active and Passive Recovery on Blood Lactate and Performance in Elite Male Hockey Players written by Nicholas J. Siekirk and published by . This book was released on 2012 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hockey players traditionally engage in passive recovery between playing shifts and in between periods. The habit of passive recovery between periods, however, is being questioned with emerging evidence that a more "active" recovery may expedite lactate removal and lead to improvements of performance in the subsequent periods of play. The purpose of this study was to examine the effects of active and passive recovery on blood lactate concentration and subsequent performance of repeated work bouts in elite hockey players (n-7). Utilizing a randomized crossover design, subjects performed 7 shifts of a hockey specific task before and after 12 minutes of either active (50-60% peak power on cycle ergometer) or passive (complete muscle inactivity) recovery. Blood lactate was significantly lower following active versus passive recovery. While not influencing performance, active recovery reduced blood lactate accumulation in subsequent periods of simulate hockey play compared to passive recovery.
Download or read book The Wingate Anaerobic Test written by Omri Inbar and published by Human Kinetics Publishers. This book was released on 1996 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Wingate Anaerobic Test is an invaluable reference for exercise physiologists, physical therapists, physical educators, sports medicine specialists, physicians, and athletic trainers." -- book cover.
Download or read book Recovery for Performance in Sport written by Christophe Hausswirth and published by Human Kinetics. This book was released on 2013 with total page 297 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recovery for Performance in Sport encompasses the latest scientific research in the study of recovery and draws from the experience of applied sport scientists working with elite athletes in leading performance and recovery centers around the globe.
Download or read book The Impact of Low load Training with Partial Vascular Occlusion on Cycle Ergometer Peak Power written by Christopher Popovici and published by . This book was released on 2011 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: Purpose of this study was to determine if partial vascular occlusion of working musculature during all out cycling on an ergometer would improve peak-power output, as measured during a Wingate Test. Subjects were separated into three training groups: a low-load occluded group (LLO, n=7), a low-load free-flow group (LL, n=7) and a high-load free flow group (HL, n=7). The low-load groups (LL and LLO) trained twice a week at 45% of the resistance used during their Wingate test, while the high-load group (HL) trained twice per week at 95% of the resistance used during Wingate testing. Training involved short sprint intervals at a maximum cadence ranging in time from 4 to 10 seconds per repetition, and 4 to 8 repetitions per session. After 10 training sessions, subjects in the LLO group and subjects in a HL group both improved significantly from pre to post testing in relative peak power (watts/kilogram) by 14.4% and 14.1% respectively, while individuals in the LL group saw no significant improvement in relative peak power (4.6%). The LLO group improved significantly over the LL (p = .041), while the HL group's improvement, compared to the LL group, nearly reached significance (p = .082). Utilizing low-load training under partially occluded conditions during sprinting on a cycle ergometer results in significant improvement to relative peak power output.
Download or read book Textbook of Work Physiology written by Per-Olof Åstrand and published by Human Kinetics. This book was released on 2003 with total page 664 pages. Available in PDF, EPUB and Kindle. Book excerpt: This updated and revised fourth edition of the respected Textbook of Work Physiology combines classical issues in exercise and work physiology with the latest scientific findings. The result is an outstanding professional reference that will be indispensable to advanced students, physiologists, clinicians, physical educators--any professional pursuing study of the body as a working machine. Written by world-renowned exercise physiologists and sports medicine specialists, the new edition retains the important historical background and exercise physiology research conducted by the authors over the past 40 years. In addition, it brings you up-to-date on the growth in the field since the previous edition, presenting today's most current scientific research findings. Beyond the scientific details, the book also addresses the application of this information to the fields of exercise physiology and work physiology, making the resource more useful than ever. Textbook of Work Physiology, Fourth Edition includes these updated features: -More than 1,600 references -"Classical studies" and "additional reading" side boxes for those who wish to study a topic more closely -In-depth studies taken from the working world, recreational activities, and elite sport -More than 380 illustrations, tables, and photos -Comprehensive appendix, including glossary, list of symbols, conversion tables, and definitions of terms and units
Download or read book Revue Canadienne de Physiologie Appliqu e written by and published by . This book was released on 1997 with total page 740 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal of Sports Medicine and Physical Fitness written by and published by . This book was released on 1996 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Exercise and Rehabilitation in Heart Failure An Issue of Heart Failure Clinics written by Ross Arena and published by Elsevier Health Sciences. This book was released on 2014-12-26 with total page 201 pages. Available in PDF, EPUB and Kindle. Book excerpt: This multidisciplinary issue of Heart Failure Clinics examines a critical element in the management and treatment of heart failure (HF)—exercise and rehabilitation. Topics include the reversal of HF-associated pathophysiology with exercise; quantifying function; prognosis; rehabilitation practice patterns in the United States, Canada, South America, Asia, and Europe; special considerations such as obesity, high-intensity interval training, inspiratory muscle training, and technology to promote and increase physical activity.
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.
Download or read book The Effect of One Night of Sleep Restriction on Aerobic Exercise Performance written by and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Purpose: Sleep is essential for bodily recovery and is especially important for athletes who will sustain high volumes of muscle damage. Many athletes struggle to get enough sleep, particularly the night prior to competition for a variety of reasons. Long term sleep deprivation has definitively shown negative effects on athletic performance; however, little is known about the effect of a single night of reduced sleep.Methods: Complete data was gathered on nine subjects. Following VO2max testing and a familiarization trial, subjects performed two experimental trials that concluded with simulated 3- km time trials on a cycle ergometer: one the morning following normal sleep and another following a night of restricted sleep, in a randomly assigned order. Results: There was no significant difference between restricted and normal sleep for average power output (p=.278), peak power output (p=.625), and time trial finish time (p=.507). Though not statistically significant, sleep restriction resulted in a 10.5 second (2.85%) faster finishing time, with 5 of 8 subjects finishing faster in those conditions. Conclusion: There were no significant changes observed in performance under normal sleep versus sleep restricted conditions. A potential mechanism for the slightly faster finish times observed under sleep restricted conditions is that sleep inertia hindered performance after normal sleep due to the proximity of testing to wake time. Further research is needed to improve statistical power, and better explore the effects of sleep inertia.
Download or read book Cardioprotection written by Derek Hausenloy and published by Oxford University Press. This book was released on 2009-08-20 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coronary heart disease (CHD) is the leading cause of death worldwide. Cardioprotection refers to the prevention of CHD and the clinical improvement in patients suffering from cardiovascular problems.
