Download or read book Changes in Lower Extremity Landing Biomechanics Resulting from Fatigue written by Michael Lawrence Madigan and published by . This book was released on 2001 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effects of a Functional Fatigue Protocol on Landing Kinetics and Kinematics of the Lower Extremity written by Ashley S. Long and published by . This book was released on 2005 with total page 127 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discussion. Significant changes in time to peak GRF, time to peak of maximum knee flexion, muscle activation and temporal patterning may suggest a kinematic difference in landing form in a fatigued state.
Download or read book The Influence of Residual Fatigue on Lower Limb Stiffness During Jump Landing written by Lindsay Victoria Slater and published by . This book was released on 2010 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: Background: Anterior cruciate ligament (ACL) injuries have become commonplace among female athletes in today's society. With more than 70% of injuries resulting from noncontact mechanisms such as jump landing, the relationship between fatigue and altered movements patterns has become an important topic of research. Purpose: The main purpose of this study was to investigate the influence of residual fatigue on lower extremity kinematics and vertical leg stiffness at landing as experienced by female athletes. Method: The participants in this study were 12 NCAA female intercollegiate soccer players. Participants completed five single-leg drop jumps on their dominant leg every day for 4 days. The first day was completed without intervention to obtain pre-fatigue data and drop jumps on days two through four were completed after a fatigue protocol. Results: A repeated measures MANOVA did not reveal significant differences in post-fatigue peak knee flexion angle, vertical ground reaction forces, or vertical leg stiffness. Despite lack of statistical significance, vertical leg stiffness was increased during post-fatigue testing when compared to pre-fatigue values. Implications: The increased vertical leg stiffness may indicate altered landing techniques in post-fatigue states. If fatigue results in compromised movement patterns, it may explain the increased number of ACL injuries during the end of soccer matches. Suggestions for Future Research: Future research with a larger sample size should include post-fatigue dominant and nondominant leg comparison due to previous conflicting findings regarding which limb is most often injured. Future researchers should also quantify the magnitude of fatigue induced by the fatiguing protocol to document the strength of the independent variable.
Download or read book Biomechanical Evaluation of Landing Maneuvers in Soccer Players with an Anterior Cruciate Ligament Reconstruction written by Ahmad Alanazi and published by . This book was released on 2017 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation is composed of 3 studies. The first study included the following purposes 1) to evaluate within-session reliability of kinematics and kinetics during 2 landing tasks to determine the number of trials needed to achieve acceptable reliability, 2) to determine between-session reliability of kinematics, kinetics, and F-Scan system during the 2 landing maneuvers performed by healthy soccer players, 3) to evaluate the validity (concurrent validity) of the F-Scan system in relation to a platform system as a criterion reference during both landing maneuvers. The results indicated that F-Scan and 3D motion analysis systems are reliable during planned and unplanned landing maneuvers in healthy soccer players. Additionally, both landings can be used as functional tasks to assess lower extremity performance in this population if 4 trials of each landing are used in order to achieve good trial-to-trial reliability. Moreover, the F-Scan system is a valid instrument to measure ground reaction forces during planned and unplanned landing maneuvers. The second study aimed to compare kinematics, kinetics, and neuromuscular performance between soccer players with an ACLR and healthy non-injured soccer players during planned and unplanned landing maneuvers. The results showed that unplanned landing demonstrated greater injury predisposing factors compared with planned landing by exhibiting a stiff landing technique characterized by decreased hip and knee flexion angles. Generally, soccer players with ACLR showed nearly similar landing mechanics and neuromuscular strategies to healthy non-injured soccer players during both planned and unplanned landing maneuvers. However, soccer players with ACLR appear to utilize a protective landing strategy by decreasing activation of the gastrocnemius muscle, when averaged across both landing tasks. The purpose of the third study was to evaluate the effect of fatigue on landing biomechanics during an unplanned landing task in soccer players following ACLR compared with healthy non-injured soccer players. The results indicted that fatigue caused changes in landing biomechanics; however, these changes were not significantly different when the groups were compared. These results indicate that having an ACLR (at least 1 year post-surgery) does not appear to lead to sustained changes in landing biomechanics induced by fatigue.
Download or read book Influence of the High Intensity Dance Performance Fitness Test on Lower Extremity Biomechanics written by Erica Burke and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Recovery stress Questionnaire for Athletes written by Michael Kellmann and published by Human Kinetics. This book was released on 2001 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides athletic specialists, trainers, and coaches with resources for monitoring athletes to avoid over-training, burnout, and decreased performance. The questionnaire is based on the hypothesis that an accumulation of stress in different areas of life, with insufficient opportunity for recovery, leads to a compromised psychophysical state. Stress states are based on 12 nonspecific and seven sports-specific scales. The questionnaire package offers tools to measure and track an athlete's recovery, including two complete questionnaires (72- and 56-item forms), manual scoring keys, profile sheets, and a user manual that describes questionnaire development and data and profile interpretation.c. Book News Inc.
Download or read book Effects of Exercise Induced Muscular Fatigue on the Kinetics and Electromyographic Activity of a Single leg Vertical Jump in Healthy Men written by Thomas Kevin Robinson and published by . This book was released on 2004 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: Purpose/Hypotheses: The knee is the most commonly injured major joint, with approximately 80,000 anterior cruciate ligament (ACL) injuries annually. Epidemiological studies of sporting events show that knee injury frequency increases during during the latter portion of the game, thus injury may be associated with biomechanical changes induced by fatigue. We investigated the bilateral effects of unilateral lower extremity (LE) extensor muscle fatigue on electromyographic (EMG) patterns, kinematics, and kinetics of the single-leg vertical jump. Subjects: 15 healthy males, 22-29 years old. Methods: Subjects performed 5 maximal single-leg vertical jumps with each leg. Bilateral EMG (gluteus medius, vastus medialis and lateralis, medial and lateral hamstrings, gastroc/soleus), 3D lower extremity motion and ground reaction forces (GRF) from the jumping/landing leg were collected simultaneously. Subjects exercised the dominant LE (plant leg when kicking a ball) on a leg press machine to fatigue (unable to perform a complete leg press against resistance of 30% of body weight), then single-leg vertical jumps were repeated. Data were exracted in relation to landing events - initial force plate contact and the peak vertical GRF. EMG data were averaged across 5 trials and normalized as a percentage of the pre-exercise value for each muscle. Data analysis used repeated measures ANOVA and MANOVA. Results: There were significant interactions between limb dominance and fatigue for frontal plane knee valgus/varus moment (p=.035; larger on the dominant knee after exercise) and peak vertical GRF (p=.013; lower on the dominant leg after exercise). There was also a main effect of fatigue on peak anterior shear ground reaction force (p=.008; greater for the dominant leg after exercise). The dominant leg had significantly greater EMG activity of the gluteus medius and medial hamstring muscle groups. Conclusion: Despite reduced vertical and anterior GRF following exercise, landing from a single-leg vertical jump produced greater knee valgus moments and more EMG activity in the gluteus medius ad medial hamstring muscle groups in the dominant (exercised) leg and greater lateral hamstring and gastroc/soleus EMG activity in the non-dominant leg. Clinical Relevance: The change in post-fatigue forces in the dominant limb, particularly increased knee valgus moments, may increase the risk of ACL injury. The post-fatigue increase in gluteus medius and medial hamstring activity may be compensatory strategies to counteract the potentially damaging forces.
Download or read book The influence of fatigue on injury risk in male youth soccer written by Michal Lehnert and published by Palacký University Olomouc. This book was released on with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents information regarding changes in lower limb injury risk factors when fatigue is present, and the role of genetics in injury risk in male youth soccer. As many internal risk factors are modifiable, information presented both in the theoretical part of the book and original research studies focuses on the influence of acute, residual and accumulated fatigue on physiological mechanisms are presented to aid sports scientists and coaches to understand the age related effects of fatigue on such factors. This information can help coaches monitor fatigue related responses and be able to create efficient training programmes during important periods of growth and maturation. This will help to enhance performance and reduce injury risk in youth male soccer.
Download or read book Biomechanics of Distance Running written by Peter R. Cavanagh and published by . This book was released on 1990 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biomechanics of Distance Running is exclusively devoted to the scientific study of distance running mechanics. This volume should be an essential reference for sport biomechanists, exercise scientists, and elite track coaches.
Download or read book Injuries in Athletics Causes and Consequences written by Semyon M. Slobounov and published by Springer Science & Business Media. This book was released on 2008-06-17 with total page 539 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the past decade, the scientific information on psychology of injury has increased considerably. Despite dramatic advances in physical education of coaches, field of medicine, athletic training, and physical therapy, the sport-related traumatic injuries is our major concern. Athletic injuries, both single and multiple, have a tendency to grow dramatically. Accordingly, prevention of sport-related injuries is a major challenge facing the sport medicine world today. The purpose of this book is to accumulate the latest development in psychological analyses, evaluation, and management of sport-related injuries, including traumatic brain injuries. No two traumatic injuries are alike in mechanism, symptoms, or symptoms resolution. There is still no agreement upon psychological diagnosis and there is no known comprehensive treatment for sport-related injuries for regaining pre-injury status. Physical symptoms resolution is not an indication of "psychological trauma" resolution.
Download or read book Laterality in Sports written by Florian Loffing and published by Academic Press. This book was released on 2016-08-19 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt: Laterality in Sports: Theories and Applications summarizes recent research on the neurophysiological foundations of handedness, and how left or right lateralization (affecting primary hand use, foot use, and eye use) affects motor control, performance outcome, skill acquisition, and achievement of sports expertise—both for one-on-one sports and team sports. As laterality research has matured, greater focus has been given to applications in human endeavours and, in particular, sport. The book examines performance within individual sports, and discusses the coaching ramifications of coaching to a specific lateralization preference. Describes the neurophysiological foundations of handedness Discusses the origins and development of laterality in humans Summarizes the impact of laterality on motor control and sports performance Encompasses research on both individual and team sports Includes research on skill acquisition, coaching, and development of expertise Covers research on laterality in preferred hand, foot, and eye use in sports
Download or read book Advances in Human Factors in Sports Injury Prevention and Outdoor Recreation written by Tareq Ahram and published by Springer. This book was released on 2017-06-14 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes cutting-edge applications of human factors for sports, injury prevention and outdoor recreation disciplines and provide practical guidance on a range of methods for describing, representing, and evaluating human, team, and system performance in various domains. Contributions in this book show how various human factors methods, applied historically in the complex safety critical domains, are suited to describing and understanding sports performance and sports injury prevention. The book discusses a wealth of methods for different purposes, such as data collection, task analysis (including cognitive task analysis), workload measurement, assessing situation awareness, performance assessment (including team performance assessment),decision making and cognition in sports, human error identification, and interface evaluation methods. With respect to other publications in human factors and ergonomics, which have been more focused on the biomechanical, physiological, environmental, and equipment-related aspects of sports performance, this book gives a special emphasis to research on analysis of individual and team sports, cognitive and social human factors, and covers both sports and outdoor recreation disciplines. Based on the AHFE 2017 Conference on Human Factors in Sports, Injury Prevention and Outdoor Recreation, held on July 17-21, 2017, in Los Angeles, California, USA, this book provides readers with a timely survey of new methods that can be implemented during any sport or outdoor recreation event, and for analyzing and improving the performance and safety of both individuals and teams.
Download or read book Methods In Biomechanics and Bionics written by Zhen Luo and published by Frontiers Media SA. This book was released on 2024-01-02 with total page 257 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book 11th Mediterranean Conference on Medical and Biological Engineering and Computing 2007 written by Tomaz Jarm and published by Springer Science & Business Media. This book was released on 2007-10-24 with total page 1183 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biomedical engineering brings together bright minds from diverse disciplines, ranging from engineering, physics, and computer science to biology and medicine. This book contains the proceedings of the 11th Mediterranean Conference on Medical and Biological Engineering and Computing, MEDICON 2007, held in Ljubljana, Slovenia, June 2007. It features relevant, up-to-date research in the area.
Download or read book Human Muscle Fatigue written by Craig Williams and published by Routledge. This book was released on 2009-06-18 with total page 529 pages. Available in PDF, EPUB and Kindle. Book excerpt: When human muscle fatigues, athletic performance becomes impaired. For those individuals suffering muscle or metabolic diseases the effects of muscle fatigue can make everyday tasks difficult. Understanding the scientific processes responsible for skeletal muscle fatigue is therefore central to the study of the physiology of sport, exercise and health. Written by a team of leading international exercise scientists, this book explores the mechanisms of muscle fatigue and presents a comprehensive survey of current research on this important topic. Examining the wide variety of protocols, assessment methods and exercise models used to study muscle fatigue, the book explores the differential effects of fatigue as influenced by: age gender fitness and training the use of ergogenic aids medical conditions including cerebral palsy, muscular dystrophy and glycogenosis. Human Muscle Fatigue covers both clinical and applied approaches in sport and exercise physiology and devotes an entire section to the conceptual framework underpinning research in this area, helping readers from a wide range of backgrounds to engage with the topic. Accessible and detailed, this book is a key text for students and practitioners working in exercise and sports science, medicine, physical therapy and health.
Download or read book Computational Intelligence in Electromyography Analysis written by Ganesh R. Naik and published by BoD – Books on Demand. This book was released on 2012-10-17 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electromyography (EMG) is a technique for evaluating and recording the electrical activity produced by skeletal muscles. EMG may be used clinically for the diagnosis of neuromuscular problems and for assessing biomechanical and motor control deficits and other functional disorders. Furthermore, it can be used as a control signal for interfacing with orthotic and/or prosthetic devices or other rehabilitation assists. This book presents an updated overview of signal processing applications and recent developments in EMG from a number of diverse aspects and various applications in clinical and experimental research. It will provide readers with a detailed introduction to EMG signal processing techniques and applications, while presenting several new results and explanation of existing algorithms. This book is organized into 18 chapters, covering the current theoretical and practical approaches of EMG research.
Download or read book Understanding and Preventing Noncontact ACL Injuries written by American Orthopaedic Society for Sports Medicine and published by Human Kinetics Publishers. This book was released on 2007 with total page 315 pages. Available in PDF, EPUB and Kindle. Book excerpt: Grade level: 11, 12, i, s, t.
