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 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 Kinematic and Kinetic Effects of Fatigue on Vertical Jumping written by Scott Douglas Betty and published by . This book was released on 1994 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Surface Electromyography written by Roberto Merletti and published by John Wiley & Sons. This book was released on 2016-05-02 with total page 592 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reflects on developments in noninvasive electromyography, and includes advances and applications in signal detection, processing and interpretation Addresses EMG imaging technology together with the issue of decomposition of surface EMG Includes advanced single and multi-channel techniques for information extraction from surface EMG signals Presents the analysis and information extraction of surface EMG at various scales, from motor units to the concept of muscle synergies.
Download or read book The Complete Guide to Stretching written by Christopher M. Norris and published by Bloomsbury Publishing. This book was released on 2015-11-05 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: A reasonable level of flexibility is essential to the healthy functioning of joints and muscles, which in turn facilitates performance and reduces the risk of injury. Now in its 4th edition, The Complete Guide to Stretching provides an accessible overview of the scientific principles that underpin this form of training and offers more than 70 exercises designed to safely increase range of motion right across the body. The Complete Guide to Stretching is the definitive practical handbook for: - Sports participants and recreational exercisers who are keen to achieve a level of flexibility that will enhance their performance - Sports coaches and fitness instructors who are seeking a thorough understanding of the principles and practice of this often neglected component of physical fitness - Sport and exercise therapists who use stretching as an important part of a balanced rehabilitation programme Full colour photographs demonstrate the stretches throughout.
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 Science Theory and Clinical Application in Orthopaedic Manual Physical Therapy Applied Science and Theory written by Ola Grimsby and published by Lulu.com. This book was released on 2008-09-16 with total page 558 pages. Available in PDF, EPUB and Kindle. Book excerpt: This long awaited textbook from The Ola Grimsby Institute provides decades of clinical experience and reasoning, with both historical and current evidence, with rationale for both passive and active treatments in orthopaedic manual therapy. Practical guidelines for joint mobilization and exercise rehabilitation are presented with this logical and exciting work. Incorporating experience and science, this book provides new approaches and treatment principles to make what you already do more effective. Extensive Content: Over 535 pages and 275 illustrations, photographs and tables Ola Grimsby and his co-authors have compiled a significant resource for the practicing physical therapist, manual therapist or osteopath.
Download or read book Cumulated Index Medicus written by and published by . This book was released on 2000 with total page 1844 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Physical Fitness sports Medicine written by and published by . This book was released on 1987 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt: Consists of citations selected from those contained in the National Library of Medicine's Medical Literature Analysis and Retrieval System.
Download or read book Science and Practice of Strength Training written by Vladimir M. Zatsiorsky and published by Human Kinetics Publishers. This book was released on 2020-04-09 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt: Science and Practice of Strength Training addresses the complexity of strength training programs while providing advice in customizing programs for athletes and other populations. It covers velocity training, intensity, timing, exercises, injury prevention, overtraining, and athlete monitoring.
Download or read book Essentials of Strength Training and Conditioning written by Thomas R. Baechle and published by Human Kinetics. This book was released on 2008 with total page 660 pages. Available in PDF, EPUB and Kindle. Book excerpt: Now in its third edition, Essentials of Strength Training and Conditioningis the most comprehensive reference available for strength and conditioning professionals. In this text, 30 expert contributors explore the scientific principles, concepts, and theories of strength training and conditioning as well as their applications to athletic performance. Essentials of Strength Training and Conditioningis the most-preferred preparation text for the Certified Strength and Conditioning Specialist (CSCS) exam. The research-based approach, extensive exercise technique section, and unbeatable accuracy of Essentials of Strength Training and Conditioningmake it the text readers have come to rely on for CSCS exam preparation. The third edition presents the most current strength training and conditioning research and applications in a logical format designed for increased retention of key concepts. The text is organized into five sections. The first three sections provide a theoretical framework for application in section 4, the program design portion of the book. The final section offers practical strategies for administration and management of strength and conditioning facilities. -Section 1 (chapters 1 through 10) presents key topics and current research in exercise physiology, biochemistry, anatomy, biomechanics, endocrinology, sport nutrition, and sport psychology and discusses applications for the design of safe and effective strength and conditioning programs. -Section 2 (chapters 11 and 12) discusses testing and evaluation, including the principles of test selection and administration as well as the scoring and interpretation of results. -Section 3 (chapters 13 and 14) provides techniques for warm-up, stretching, and resistance training exercises. For each exercise, accompanying photos and instructions guide readers in the correct execution and teaching of stretching and resistance training exercises. This section also includes a set of eight new dynamic stretching exercises. -Section 4 examines the design of strength training and conditioning programs. The information is divided into three parts: anaerobic exercise prescription (chapters 15 through 17), aerobic endurance exercise prescription (chapter 18), and periodization and rehabilitation (chapters 19 and 20). Step-by-step guidelines for designing resistance, plyometric, speed, agility, and aerobic endurance training programs are shared. Section 4 also includes detailed descriptions of how principles of program design and periodization can be applied to athletes of various sports and experience levels. Within the text, special sidebars illustrate how program design variables can be applied to help athletes attain specific training goals. -Section 5 (chapters 21 and 22) addresses organization and administration concerns of the strength training and conditioning facility manager, including facility design, scheduling, policies and procedures, maintenance, and risk management. Chapter objectives, key points, key terms, and self-study questions provide a structure to help readers organize and conceptualize the information. Unique application sidebars demonstrate how scientific facts can be translated into principles that assist athletes in their strength training and conditioning goals. Essentials of Strength Training and Conditioningalso offers new lecture preparation materials. A product specific Web site includes new student lab activities that instructors can assign to students. Students can visit this Web site to print the forms and charts for completing lab activities, or they can complete the activities electronically and email their results to the instructor. The instructor guide provides a course description and schedule, chapter objectives and outlines, chapter-specific Web sites and additional resources, definitions of primary key terms, application questions with recommended answers, and links to the lab activities. The presentation package and image bank, delivered in Microsoft PowerPoint, offers instructors a presentation package containing over 1,000 slides to help augment lectures and class discussions. In addition to outlines and key points, the resource also contains over 450 figures, tables, and photos from the textbook, which can be used as an image bank by instructors who need to customize their own presentations. Easy-to-follow instructions help guide instructors on how to reuse the images within their own PowerPoint templates. These tools can be downloaded online and are free to instructors who adopt the text for use in their courses. Essentials of Strength Training and Conditioning, Third Edition,provides the latest and most comprehensive information on the structure and function of body systems, training adaptations, testing and evaluation, exercise techniques, program design, and organization and administration of facilities. Its accuracy and reliability make it not only the leading preparation resource for the CSCS exam but also the definitive reference that strength and conditioning professionals and sports medicine specialists depend on to fine-tune their practice.
Download or read book Biomechanical Basis of Human Movement written by Joseph Hamill and published by LWW. This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Focusing on the quantitative nature of biomechanics, this book integrates current literature, meaningful numerical examples, relevant applications, hands-on exercises, and functional anatomy, physics, calculus, and physiology to help students - regardless of their mathematical background - understand the full continuum of human movement potential.
Download or read book Fitness for Life written by Charles B. Corbin and published by Human Kinetics. This book was released on 2010 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: A program that focuses attention on schoolwide wellness during four weeks of the school year. Helps schools incorporate coordinated activities that will enable them to meet national standards and guidelines for physical activity and nutrition.
Download or read book Introduction to Sports Biomechanics written by Roger Bartlett and published by Routledge. This book was released on 2002-04-12 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: First published in 1996. Routledge is an imprint of Taylor & Francis, an informa company.
Download or read book Index Medicus written by and published by . This book was released on 2002 with total page 1780 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vols. for 1963- include as pt. 2 of the Jan. issue: Medical subject headings.
Download or read book Biomechanical Performance and Relevant Mechanism of Physical Medicine and Rehabilitation for Neuromusculoskeletal Disorders written by Qipeng Song and published by Frontiers Media SA. This book was released on 2023-11-23 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biomechanical performance is a key to evaluating effectiveness in physical medicine and rehabilitation for neuromusculoskeletal disorders. Assessments can be applied to degenerative dysfunction (e.g., falls or knee osteoarthritis in older adults) and sports-related injuries (e.g., ankle sprain or anterior cruciate ligament injury). Patients' body movements and daily activity functions can be compared to the state of pre-injury condition or to the level of healthy individuals. Some cutting-edge studies have gone a step further and used biomechanical performance to develop physical medicine and rehabilitation approaches and explore the mechanisms behind their effectiveness. However, such studies are still relatively rare. This research topic is intended to encourage more relevant projects to be published. This research topic aims to encourage researchers to use biomechanical performance to design advanced physical medicine and rehabilitation approaches, evaluate the effectiveness of the rehabilitation approaches, and explore the mechanisms by which rehabilitation approaches work for neuromusculoskeletal disorders. Some studies have developed stretching approaches for the rehabilitation of knee osteoarthritis in older adults by measuring biomechanical performance during functional activities. Some studies indicated that the mechanism of physical activity to reduce falls in older adults lies in its effectiveness in increasing proprioceptive sensitivity, and further indicated that rehabilitation of proprioception may be a key to reducing falls in the fall-prone older adult population. Some other studies analyzed biomechanical performance in ankle ligament injuries to understand when, how, and why ligaments fail. As a result, this research topic will expand the application of biomechanical performance to better understand and treat neuromusculoskeletal disorders.
