Download or read book Biomechanical Analysis of Eccentric and Concentric Lifting Exertions written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: There is considerable evidence that low back injuries and disorders are related to heavy loads applied to the human spine. Biomechanical models have been invented to examine spinal load patterns under various conditions and to estimate the risk of low back injuries. One group of these models are called electromyographic (EMG) -assisted biomechanical models which use the EMG activities of the trunk muscles to predict muscle force and the spine reaction forces. Previous EMG-assisted biomechanical models have been used to study the spinal loads under various conditions: trunk flexionD xtension, lateral bending and twisting exertions. One of the challenges facing these models is that they rely heavily on the active muscle force component. In certain kinds of exertions (eccentric exertions and exertions at or near the full flexion trunk postures) the passive components of the extensor mechanism play a significant role in the net extensor moment, and these are not captured in the traditional EMG-assisted modeling technique. This study introduces a new EMG assisted biomechanical model that includes passive components. Empirical experiments were conducted to evaluate the improvements in model predictions when these passive tissue components were considered. Eighteen subjects participated in two groups of experiments. In experiment one, subjects performed repetitive, eccentric and concentric lifting motions in a controlled dynamometer task environment. In experiment two, subjects performed a repetitive, free dynamic lifting and lowering exertions. In both experiments, the subjects were asked to reach their full trunk flexion posture during the lifting motion. As they performed these tasks, the EMG activity of the major trunk muscles was collected. Based on the degree of trunk flexion experienced by the subjects, the passive tissue forces were estimated through the use of a finite element model of the lumbar region. Estimates of the net internal extensor moment were der.
Download or read book Eccentric Muscle Training in Sports and Orthopaedics written by Mark Albert and published by . This book was released on 1995 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thoroughly updated manual will cover the concepts and techniques of muscle strengthening using dynamic and isokinetic equipment. Describes and illustrates the scientific and clinical rationalefor eccentric muscle training from the perspectives of the literature, functional importance, and clinical experience Focuses on principles and guidelines that enable safe, effective application of eccentric muscle loads Classifies and addresses eccentric muscle training in five areas: isotonics, plyometrics, inertial loading, isokinetics (using robotics), and free weights and power lifting Additional coverage on the neurologic basis of eccentric muscle training New sections on the knee and shoulder
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2008 with total page 906 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Occupational Biomechanics written by Don B. Chaffin and published by John Wiley & Sons. This book was released on 2006-05-05 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: Praise for previous editions of Occupational Biomechanics "This book is a valuable resource for any advanced ergonomist interested in physical ergonomics . . . provides valuable research information." -Ergonomics in Design "[This book] represents a distillation of the authors' combined years of experience in applying biomechanicsin various industries and work situations . . . I recommend this book to anyone, regardless of discipline, who is interested in understanding the many biomechanical factors which must be considered when trying to effectthe prevention and reduction of musculoskeletal injuries in the workplace." -Journal of Biomechanics "Impressive descriptions of biomechanical concepts and worksite considerations . . . based not only on mechanical and mathematical principles, but on solid anatomical and physiologic constructs . . . a very valuablereference source." -Research Communications in Chemical Pathology and Pharmacology THE DEFINITIVE TEXT ON DESIGNING FOR THE DEMANDS OF TODAY'S WORKPLACE With critical applications in manufacturing, transportation, defense, security, environmental safety and occupational health, and other industries, the field of occupational biomechanics is more central to industrial design than ever before. This latest edition of the popular and widely adopted Occupational Biomechanics provides the foundations and tools to assemble and evaluate biomechanical processes as they apply to today's changing industries, with emphasis on improving overall work efficiency and preventing work-related injuries. The book expertly weaves engineering and medical information from diverse sources and provides a coherent treatment of the biomechanical principles underlying the well-designed and ergonomically sound workplace. NEW TO THIS THOROUGHLY REVISED AND UPDATED FOURTH EDITION: * 150 new references and many new illustrations * Major changes within each chapter that reflect recent and significant findings * Recent research in musculoskeletal disorders * New measurement techniques for biomechanical parameters and numerous international initiatives on the subject Presented in an easy-to-understand manner and supported by over 200 illustrations and numerous examples, Occupational Biomechanics, Fourth Edition remains the premier one-stop reference for students and professionals in the areas of industrial engineering, product and process design, medicine, and occupational health and safety.
Download or read book Advances in Industrial Ergonomics and Safety written by Anil Mital and published by Taylor & Francis. This book was released on 1989 with total page 1004 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biomechanics Aging Exercise and Other Interventions written by Rafael Reimann Baptista and published by Frontiers Media SA. This book was released on 2022-12-01 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biomechanics in Sport Performance Enhancement and Injury Prevention written by Vladimir Zatsiorsky and published by John Wiley & Sons. This book was released on 2008-04-15 with total page 680 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biomechanics in Sport is a unique reference text prepared by the leading world experts in sport biomechanics. Over thirty chapters cover a broad spectrum of topics, ranging from muscle mechanics to injury prevention, and from aerial movement to wheelchair sport. The biomechanics of sports including running, skating, skiing, swimming, jumping in athletics, figure skating, ski jumping, diving, javelin and hammer throwing, shot putting, and striking movements are all explained.
Download or read book Scientific Foundations and Practical Applications of Periodization written by G. Gregory Haff and published by Human Kinetics. This book was released on 2024-02-23 with total page 602 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scientific Foundations and Practical Applications of Periodization is the first book of its kind designed to optimize sport performance by integrating classic and modern periodization theories with recovery methodologies, nutritional interventions, and athlete monitoring guidelines.
Download or read book A Study on Eccentric Vs Concentric Strength Training written by Anthony Shellard and published by . This book was released on 1984 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Anthropometry and Biomechanics written by Ronald Easterby and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: Assessment of the physical dimensions of the human body and application of this knowledge to the design of tools, equip ment, and work are certainly among the oldest arts and sciences. It would be an easy task if all anthropometric dimensions, of all people, would follow a general rule. Thus, philosophers and artists embedded their ideas about the most aesthetic proportions into ideal schemes of perfect proportions. "Golden sections" were developed in ancient India, China, Egypt, and Greece, and more recently by Leonardo DaVinci, or Albrecht Durer. However, such canons are fictive since actual human dimensions and proportions vary greatly among individuals. The different physical appearances often have been associated with mental, physiological and behavioral characteristics of the individuals. Hypocrates (about 460-377 BC) taught that there are four temperaments (actually, body fluids) represented by four body types. The psychiatrist Ernst Kretchmer (1888-1964) proposed that three typical somatotypes (pyknic, athletic, aesthenic) could reflect human character traits. Since the 1940's, W. H. Sheldon and his coworkers devised a system of three body physiques (endo-, meso-, ectomorphic). The classification was originally qualitative, and only recently has been developed to include actual measurements.
Download or read book Strength and Conditioning written by Gavin Moir and published by Jones & Bartlett Publishers. This book was released on 2015 with total page 678 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text incorporates programming aspects of strength and conditioning including training methods to develop muscular strength and power, flexibility, and the development of effective warm-up regimens. Performance analysis techniques in sport are introduced while the constraints-led approach to motor skills acquisition is presented as a framework that can guide the development of practices for the strength and conditioning practitioner. The biomechanical and motor skill acquisition concepts introduced in the text are then applied to fundamental movements including jumping, landing, and sprint running.
Download or read book Comparison of Concentric eccentric Vs Concentric Isokinetic Training Regimens on Muscle Strength and Hypertrophy Gains written by Todd Aaron McBride and published by . This book was released on 1991 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NSCA s Guide to Program Design written by NSCA -National Strength & Conditioning Association and published by Human Kinetics. This book was released on 2011-12-05 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt: NSCA's Guide to Program Design offers the most current information, guidance, and protocols from respected scientists and practitioners with expertise in strength and conditioning program design. Developed by the National Strength and Conditioning Association (NSCA), this text offers strength and conditioning professionals a scientific basis for developing training programs for specific athletes at specific times of year. Straightforward and accessible, NSCA’s Guide to Program Design presents a detailed examination of considerations and challenges in developing a program for each key fitness component and fitness performance goal. Editor Jay Hoffman and his team of contributors have assembled an exceptional reference for practicing professionals and a valuable educational resource for new professionals and students preparing for certification. This authoritative text moves beyond the simple template presentation of program design to help readers grasp the reasons and procedures for sequencing training in a safe, sport-specific manner. The text offers 20 tables that are sample workouts or training plans for athletes in a variety of sports, technique photos and instructions for select drills, and a sample annual training plan that shows how to assemble all the pieces previously presented. Plus, extensive references offer starting points for continued study and professional enrichment. NSCA’s Guide to Program Design progresses sequentially through the program design process. It begins by examining the athlete needs assessment process as well as performance testing considerations and selection. Next, performance-related information on both dynamic warm-up and static stretching is discussed and dynamic warm-up protocols and exercises are presented. Then it reveals an in-depth by-chapter look at program design for resistance, power, anaerobic, endurance, agility, speed, and balance and stability training. For each, considerations and adaptations are examined, strategies and methods are discussed, and evidence-based information on program development is presented. The final two chapters help you put it all together with a discussion of training integration, periodization, and implementation. In addition, a sample annual training plan illustrates how to integrate each of the key fitness components into a cohesive yearlong program. As a bonus, a sample annual training plan is provided on our website so you can create your own training plans. The fitness, safety, and performance of athletes reflect the importance of continued education in the science of strength and conditioning. NSCA’s Guide to Program Design helps bridge the gap between scientist and practitioner by providing coaches and other strength and conditioning professionals with evidence-based information and applications. Sharing the latest in proven research, NSCA’s Guide to Program Design helps readers remain on the cutting edge of athletic performance. NSCA’s Guide to Program Design is part of the Science of Strength and Conditioning series. Developed with the expertise of the National Strength and Conditioning Association (NSCA), this series of texts provides the guidelines for converting scientific research into practical application. The series covers topics such as tests and assessments, program design, and nutrition. Earn continuing education credits/units! A continuing education course and exam that uses this book is also available. It may be purchased separately or as part of a package that includes all the course materials and exam.
Download or read book Advances In Industrial Ergonomics And Safety IV written by Shrawan Kumar and published by CRC Press. This book was released on 1992-06-02 with total page 1597 pages. Available in PDF, EPUB and Kindle. Book excerpt: Topics Include: industrial ergonomics, risk, accidents and accident prevention, safety and surveillance, posture perception, cognitive ergonomics, telerobotics, military occupational ergonomics, and international ergonomics.
Download or read book Biomechanical Analysis of Weightlifting written by Zulkifli Ahmad and published by LAP Lambert Academic Publishing. This book was released on 2013 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: Weightlifting is a sport who requires good strength and appropriate technique to make a weightlifter success in its lift. Weightlifting contains two main technique, which snatch and clean-jerk techniques. Both techniques have six phases, and the phases are, first pull; transition from first to second pull; second pull; turnover under the barbell; catching phase; rising from squat position. This book is about the biomechanical analysis on the weightlifting, and the result from the experiment will be compared with other researchers. The experiment is only for preliminary study in this thesis. The objectives for this experiment are to investigate the force exerted, observe the muscle activity and study the angle of joint on the subjects while lifting the barbell for both techniques. From the result shown by the subject and comparison with the professional athlete, the technique shown by the subject is not much different and give an almost same pattern. Analysis on weightlifting the practically as it can reduce the injuries and increase the performance of the lifter.
Download or read book The Effects of a Single Supramaximal Eccentric Contraction on Maximal Concentric Strength written by Zach Hart and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this study was to analyze and determine the effects on muscular strength, endurance, and hypertrophy of a single supramaximal eccentric contraction and submaximal concentric contraction after conventional resistance training. In this study, 2 male collegiate football athletes completed four weeks of strength training on the bench press. Training was conducted 3 times per week with 1RM testing and chest circumference measurements done before training, after two weeks of training, and after four weeks of training. The independent variables were the types of contractions being performed after the strength training- eccentric or concentric. The dependent variables were performance in the 1RM bench press, ACSM push-up test, and change in chest circumference. The bench press is an exercise that is an excellent measure of upper body strength; it’s utilized in almost every recreational lifting program and used as a measure of performance for the NFL combine and power lifting competitions. The ACSM push-up test is a test that measures upper body muscular endurance and is used to assess general health in a wide range of age groups and populations. The chest circumference measurements were used to measure muscular hypertrophy as the course of training progressed. The sessions were completed with both subjects lifting together and competing to improve 1RM the most from baseline and improve amount of push-ups done from baseline. It was hypothesized that performing a supramaximal eccentric contraction after conventional strength training on the bench press would yield higher percentage increases on the 1RM, number of push-ups performed from baseline, and muscular hypertrophy from baseline. Pilot data suggested that the hypotheses made were true. Data concluded that (1) the concentric group experienced a greater increase of strength than the eccentric group after two weeks of training (6.6% compared to 5.45% from baseline); while the eccentric group experienced a greater increase in strength than the concentric group after four weeks of training (12.72% compared to 10% from baseline), (2) the eccentric group yielded a higher percent increase in push-up repetitions after two and four weeks of training (31.43% at 2 weeks and 37.14% at 4 weeks), (3) the concentric group displayed a greater increase in chest circumference and hypertrophy after two weeks and four weeks of training (2.09% at 2 weeks and 2.70% at 4 weeks).
