Download or read book Post exercise VO2 Kinetics written by Steven Scott Segal and published by . This book was released on 1978 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Oxygen Uptake Kinetics in Sport Exercise and Medicine written by Andrew M. Jones and published by Routledge. This book was released on 2013-07-04 with total page 433 pages. Available in PDF, EPUB and Kindle. Book excerpt: Despite its crucial importance, scientists interested in the limitations of human physical performance have only just started to give the field of oxygen uptake kinetics the attention it deserves. Understanding the principal determinant of the oxygen uptake kinetics is fundamental to improving human performance or the quality of life. This book provides a detailed overview of the current state of knowledge of this emerging field of study, and features: * an introduction to oxygen uptake kinetics and historical development of the discipline * measurement and analysis of oxygen uptake kinetics * control of and limitations to oxygen uptake kinetics * applications of oxygen uptake kinetics in a range of human populations. Oxygen Uptake Kinetics in Sport, Health and Medicine is richly illustrated and structured to enable easy access of information and represents an invaluable resource for students and researchers in exercise physiology, as well as for respiratory physiologists and pulmonary clinicians.
Download or read book Oxygen Uptake Kinetics in Sport Exercise and Medicine written by Andrew M. Jones and published by Routledge. This book was released on 2013-07-04 with total page 547 pages. Available in PDF, EPUB and Kindle. Book excerpt: Despite its crucial importance, scientists interested in the limitations of human physical performance have only just started to give the field of oxygen uptake kinetics the attention it deserves. Understanding the principal determinant of the oxygen uptake kinetics is fundamental to improving human performance or the quality of life. This book provides a detailed overview of the current state of knowledge of this emerging field of study, and features: * an introduction to oxygen uptake kinetics and historical development of the discipline * measurement and analysis of oxygen uptake kinetics * control of and limitations to oxygen uptake kinetics * applications of oxygen uptake kinetics in a range of human populations. Oxygen Uptake Kinetics in Sport, Health and Medicine is richly illustrated and structured to enable easy access of information and represents an invaluable resource for students and researchers in exercise physiology, as well as for respiratory physiologists and pulmonary clinicians.
Download or read book Oxygen Uptake Kinetics in Sport Exercise and Medicine written by Andrew M. Jones and published by Psychology Press. This book was released on 2005-01 with total page 405 pages. Available in PDF, EPUB and Kindle. Book excerpt: Despite its crucial importance, scientists interested in the limitations of human physical performance have only just started to give the field of oxygen uptake kinetics the attention it deserves. Understanding the principal determinant of the oxygen uptake kinetics is fundamental to improving human performance or the quality of life. This book provides a detailed overview of the current state of knowledge of this emerging field of study, and features: * an introduction to oxygen uptake kinetics and historical development of the discipline * measurement and analysis of oxygen uptake kinetics * control of and limitations to oxygen uptake kinetics * applications of oxygen uptake kinetics in a range of human populations. Oxygen Uptake Kinetics in Sport, Health and Medicine is richly illustrated and structured to enable easy access of information and represents an invaluable resource for students and researchers in exercise physiology, as well as for respiratory physiologists and pulmonary clinicians.
Download or read book The Effects of Ambient Heat During Exercise on Recovery Oxygen Consumption Kinetics and Resting Metabolic Rate written by Marianne Gimble and published by . This book was released on 1986 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Oxygen Uptake and Blood Flow Kinetics Following the Onset of Exercise in Trained Humans written by Azmy Faisal and published by . This book was released on 2010 with total page 235 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main hypothesis of this thesis was that the regulation of oxygen uptake (VO2) kinetics at the onset of exercise in trained young men is linked to cardiovascular adaptations. Two studies were conducted to investigate the interrelationships between oxygen (O2) transport and O2 utilization in accelerating VO2 kinetics at the onset of exercise. In the first study, simultaneous kinetics of VO2 and cardiac output (Q) were studied during the transition to heavy and moderate cycling exercise (Chapter 2). The acceleration of VO2 kinetics during the heavy exercise that followed prior moderate or heavy exercise was enabled by the rapid increase in Q; whereas, the acceleration of VO2 kinetics during moderate exercise that followed a heavy warm-up was associated with small changes in Q kinetics. The objective of the second study was to determine, in a model of forearm exercise, if the elevation of forearm blood flow (FBF) prior to the onset of exercise by prior circulatory occlusion would accelerate FBF and muscle oxygen uptake (VO2mus)kinetics during subsequent exercise as demonstrated previously for prior exercise (Chapter 3). Prolonged ischemia (15 min occlusion) followed by 3 min recovery reduced FBF and impaired VO2mus kinetics during subsequent heavy hand-grip exercise. However, prior heavy exercise confirmed the previous findings and resulted in a faster FBF and VO2mus kinetics. There was a high positive correlation between the time course of change in FBF and VO2mus at the onset heavy exercise. In a follow up of the second study, to investigate a possible mechanism for the slower adaptation of VO2mus following ischemia, the prior occlusion condition was repeated after ingesting a high dose of ibuprofen. Prostaglandin inhibition by ibuprofen augmented the FBF response during reactive hyperaemia and restored FBF during the heavy exercise that followed 15 min of circulatory occlusion to the control level. These two studies provide evidence that O2 delivery plays a dominant role in accelerating VO2 kinetics at the onset of heavy exercise in trained young men. The findings exposed differences in the mechanisms regulating pulmonary VO2 and VO2mus with prior exercise resulting in higher Q and FBF, but no changes in O2 extraction to yield the faster increase in pulmonary VO2 and VO2 at the onset of subsequent heavy exercise. In contrast, prior occlusion slightly retarded the increase in FBF and significantly reduced O2 extraction thus delaying VO2 kinetics. The precise mechanisms impairing VO2mus kinetics at the onset of heavy forearm hand-grip exercise that starts after a brief recovery from prolonged occlusion are still unknown, but this impairment may be partially due to a vasoconstrictor effect restricting blood flow during the adaptation to exercise and redistribution of the blood to the periphery. In a third study, the influence of muscle activity on the VO2 slow component during heavy exercise and O2 cost during moderate exercise that followed a heavy warm-up were examined (Chapter 4). The heavy exercise VO2 slow component was attenuated in a graded fashion by prior moderate and heavy warm-ups, and the principal components analysis showed a moderate but significant correlation between the changes in the integrated electromyographic activity and the VO2 slow component amplitude. The higher O2 cost of moderate exercise following a heavy warm-up was associated with higher mean power frequency. Changes in VO2 slow component and increased O2 cost during moderate exercise after prior heavy warm-up appear to be related to some changes in surface electromyographic activity which may provide some evidence for increased muscle fibres recruitment.
Download or read book The Kinetics of Oxygen Consumption and Blood Lactate Levels in Exercise and Recovery written by James Michael Hagberg and published by . This book was released on 1976 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effect of Warm up on VO2 Kinetics During Heavy Exercise written by Marybeth T. Stockman and published by . This book was released on 2009 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: Warm-up (WU) is considered an essential part of exercise training in athletic, preventative and rehabilitative exercise programs. Exactly how WU augments exercise performance is unclear. Previous studies during free range exercise have shown down-regulation of power output (PO) and slower oxygen uptake (VO2) kinetics in the absence of WU. However, since PO early during an exercise bout is known to drive VO2 kinetics, it is unclear whether these results are primary or responsive to the lower PO in the absence of WU. Eight healthy, physically active volunteers (23.1 + 2.1 years) performed two 3 km time trials (TT), the first with WU to define mean PO (279 + 84 watts), the second without WU, and two square wave (SW) exercise tests to fatigue at a PO equal to the mean achieved on the TT with WU; one was performed with no WU and the other followed a 15 min WU protocol. Repeated measures ANOVA was used to analyze performance time, VO2 kinetics as measured by Mean Response Time (MRT), peak power output (PPO), % PPO, heart rate (HR) response, ventilation, and rating of perceived exertion. Following WU, performance time in the SW tests was not significantly greater (371.3 + 165.7 s vs. 338.3 + 155.1 s), maximal VO2 was significantly greater (4.2 + 1.1 vs. 3.9 + 0.9 L/min), HR was significantly greater (178 + 9 vs. 171 + 10 bpm), but MRT was not different (48.0 + 13.6 s vs. 45.1 + 7.9 s). Thus, the improved performance and overall aerobic response to exercise following WU could not be attributed to differences in MRT. These results fail to support the hypothesis that acceleration of VO2 kinetics, independent of differences in muscle PO, is an outcome of WU. These results suggest that the down-regulation of PO previously observed in studies of WU were responsible for the slower VO2 kinetics.
Download or read book Mechanistic Basis of the Slow Component of VO2 Kinetics During Heavy Exercise written by and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effects of Short Work Versus Longer Work Periods Within Intermittent Exercise on VO2 Kinetics Muscle Deoxygenation and Energy System Contribution written by Michael Chrisopher McCrudden and published by . This book was released on 2015 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this study was to investigate the kinetic response of oxygen uptake (VȮ2)and muscle deoxygenation (HHb) in males (24 yr±3, n = 10) to identical heavy intensity continuous (CONT), and intermittent work; 25 s (25 s work: 3 s recovery (20W)), and 10 s (10 s work: 3 s recovery (20W)), were compared. The VȮ2 were similar in all conditions (CONT: 44.2 s±9; 25 s: 38.9 s±10; 10 s: 39.4 s±8, p> 0.05), whereas the HHb/ VȮ2 overshoot decreased across conditions (p
Download or read book Determination of Respiratory Quotient from V O2 Kinetics During Supra lactate Threshold Exercise in Humans written by Steven Carl Sparks and published by . This book was released on 1995 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Oxygen Consumption Kinetics During Prolonged Heavy Exercise written by Kristina Marie Kury and published by . This book was released on 1990 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Changes in Time to Reach VO2max in Subsequent High intensity Intervals written by Adam James Switters and published by . This book was released on 2015 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: During high-intensity exercise, oxygen uptake increases until maximal oxygen consumption (VO2max) is reached. The rate at which the body uptakes oxygen can be described throughVO2 kinetics. When high-intensity exercise is preceded by an additional bout of high-intensity exercise, VO2 kinetics are altered so that VO2max is achieved sooner. Therefore, it is possible that VO2 kinetics are further altered by subsequent bouts of high-intensity exercise. To investigate the time to reach VO2max during subsequent intervals at pVO2max lasting 60% Tmax in well-trained cyclists. Twelve male cyclists completed a graded exercise test (GXT) to determine their pVO2max, followed by a time to fatigue test later that same day to determine their Tmax. After 7 days, subjects returned and completed 5 intervals at pVO2max for a duration of 60% Tmax. In between intervals, subjects pedaled at a low load (20W) for a duration equal to their interval duration. Expired air and heart rate (HR) was recorded as 20-second averages. Analysis of peak values (VO2, HR, and VE) between the GXT and interval trials was completed with a paired t-test. Analysis of interval variables (time to reach VO2max, peak VO2 HR, VE, and RER was completed with a one-way repeated measures ANOVA. A p-level of
Download or read book Non invasive Examination of the Role of Local Muscle O2 Delivery in Determining Vo2 Kinetics During Moderate intensity step and Ramp Incremental Exercise written by Matthew D. Spencer and published by . This book was released on 2012 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis was undertaken to examine the physiological mechanisms that interact to govern the adjustment of O2 uptake (VO2) during the on-transient of moderate-intensity exercise as well as during incremental exercise, using non-invasive measures. Particular emphasis was placed on the information provided by pairing breath-by-breath pulmonary VO2 measures with near-infrared spectroscopy (NIRS)-derived measures to investigate the role of local muscle O2 delivery in the determination of VO2 during various exercise challenges. The main findings were that: 1) local muscle O2 delivery likely plays a ratelimiting role in the determination of?VO2p (at least when?VO2p is greater than ~20 s), even in young, healthy adults; 2)?VO2p can be reduced by augmenting local muscle O2 delivery (with heavy-intensity 'priming' exercise) and increased by impairing local muscle O2 delivery (with acute, mild hypoxia); 3) the relative slowing of the VO2 onkinetics response when moderate-intensity exercise is initiated from an elevated baseline WR does not appear to be the result of reduced local muscle O2 delivery in older adults; 4) whereas the effects of moderate-intensity work rate (WR) increment were heterogeneous with respect to?VO2p in those with fast versus slow VO2 kinetics, increasing WR increments were associated with increasing O2 costs (i.e., functional gain; G = VO2/ WR) regardless of the rate of adjustment; this suggests that?VO2p and functional G may be dissociated; and 5) the appropriateness of a sigmoid regression to characterize the overall [HHb] response to incremental exercise (at least for comparative purposes) was challenged, and a 'double-linear' model was proposed as an alternative. Keywords: near-infrared spectroscopy, muscle O2 distribution, sigmoid.
Download or read book Development of the Youth Athlete written by Neil Armstrong and published by Routledge. This book was released on 2018-08-15 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: Development of the Youth Athlete offers a single-authored, well-illustrated, evidence-based, and integrated analysis of the development and trainability of the morphological and physiological characteristics which influence sport performance in youth. The book critically analyses the development of the youth athlete in the context of current and future sport performance and long-term health and well-being. Development of the Youth Athlete identifies the principal controversies in youth sport and addresses them through sport-specific examples. Presenting a rigorous assessment and interpretation of scientific data with an emphasis on underlying physiological mechanisms, the book focuses on the interactions between growth, maturation, and: Sport-related fitness Sport-specific trainability Sport performance Challenges in youth sport Providing the only up-to-date, coherent critical discourse on youth athlete development currently available, Development of the Youth Athlete is essential reading for students, lecturers, sport medicine practitioners, researchers, scholars, and senior coaches with an interest in youth sport, exercise science, and sport medicine.
Download or read book Rehabilitation R D Progress Reports written by and published by . This book was released on 1996 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Diabetes and Exercise written by Jane E. B. Reusch, MD and published by Humana Press. This book was released on 2017-09-27 with total page 357 pages. Available in PDF, EPUB and Kindle. Book excerpt: Now in a fully revised and updated second edition, written and editing by leading experts in the field, this comprehensive and practical text brings together the latest guidelines and recommendations on the benefits of exercise and physical activity in the management of diabetes and its complications, providing both the researcher and practitioner with evidence-based information that is both theoretically and clinically useful. Part one sets the stage by discussing the epidemiology and prevention of type 2 diabetes and the metabolic syndrome. The physiological effects of exercise in type 2 diabetes are covered in part two, covering molecular mechanisms, adiposity, sex differences, cardiovascular consequences and musculoskeletal changes. Part three addresses practical issues that are essential in order to safely engage patients with diabetes in exercise-related research protocols and clinical programs, including DPP and LOOK Ahead, nutrition, behavioral changes, and guidelines for exercise testing. The final section examines special considerations for exercise in people with diabetes, such as those with neuropathy, cardiac issues and peripheral artery disease. Taken together, Diabetes and Exercise, Second Edition brings together the latest information and thought leaders in the field to create a unique and useful text for all clinicians, researchers and therapists working to integrate physical activity into their management strategies for the increasing number of diabetic patients.
