Download or read book Acute and Delayed Effects of an Exhaustive Bout of Exercise on Landing Biomechanics in Women and Men written by Kristof Kipp and published by . This book was released on 2010 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although female athletes are at greater risk of non-contact knee injuries than men, the factors that contribute to these injuries are not well understood. One important question is whether intense exercise influences the risk of knee injury, both acutely and over the following days. The purpose of this study was thus to evaluate the acute and delayed effects of an intense bout of exercise on risk factors associated with knee injury in women and men. Fifteen each of healthy young women and men performed two testing sessions, 44-52 hours apart. In each session, biomechanical data were collected during execution of sets of 10 drop vertical jumps. An initial set of drop vertical jumps was compared to a set performed immediately after an intense exercise bout on the first day and to a set performed on the second day to determine the acute and delayed effects of fatigue, respectively. A two-way repeated measures ANOVA was used to determine the effect of the exercise bout on risk factors associated with knee injury during the jump task in women and men. Intense exercise had immediate effects on joint kinematics and kinetics, patterns of joint motion and moments, and the variability of joint couplings. The acute kinematic and kinetic changes at the hip and ankle were consistent with compensatory strategies, whereas changes at the knee were consistent with an increased risk of injury. The same appeared to be true for the patterns of joint motions and moments. Acute changes in the variability of inter- and intra-limb joint couplings were also consistent with compensatory modifications of lower limb biomechanics. Delayed effects were limited to patterns of joint motion and moments, and reflected jointdependent combinations of compensatory strategies or mechanical changes that could increase knee injury risk. Although intense exercise had acute and prolonged effects on several biomechanical variables, none of the effects depended on the sex of participants. These results indicate that intense exercise has immediate and prolonged effects on landing biomechanics, independent of sex. While the majority of changes point to a compensatory strategy, a few were consistent with increased risk of knee injury.

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 Advances in Ergometry written by Norbert Bachl and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 510 pages. Available in PDF, EPUB and Kindle. Book excerpt: Exercise testing is widely used all over the world to assess functional capacity in athletes, healthy subjects and patients. According to recent surveys, the interest in ergometry is still growing in almost all fields of medicine, especially in private practice. Furthermore, there has been an exponential growth in the number of publications on exercise testing in the last years. Several consensus and task force conferences have dealt with exercise testing and published recommendations on standardization and guidelines in ergometry. These factors have, in combination, initiated an upsurge in research and clinical use of exercise testing. At the 6th International Seminar on Ergometry the latest findings and advances in ergometry were discussed. Reviews and results of the congress covering a wide range of features in exercise testing are presented in this book. The editors hope that this book will make a substantial contribution to our knowledge regarding exercise testing and will help physicians to appropriately evaluate exercise testing in healthy and diseased subjects. The editors are indepted to Miss I. Baumgartner and Mr. W. Reith for their effort in typing and preparing the manuscripts. The editors are greatful to Springer-Verlag for the close cooperation and for their expertise in publishing the present volume. N. Bachl T. Graham H. Lallgen Contents W. Hollmann The Anaerobic Threshold as a Tool in Medicine ........... 1 L. Prokop Genetic Influences on Cardiovascular Capacity ............... 12 1) ARRHYTHMIA AND EXERCISE . . . • . . • . • • . • . 19 . . .

Download or read book Compression Garments in Sports Athletic Performance and Recovery written by Florian Engel and published by Springer. This book was released on 2016-07-12 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents recent research addressing the effects of different types of compression clothing on sport performance and recovery after exercise. It is also the first book that summarizes the effects of compression clothing on all main motor abilities in the context of various sports, offering a wealth of practical guidelines on how to optimize performance and recovery with the help of compression clothing. The book examines the effects of this clothing on physiological, psychological and biomechanical parameters including endurance, speed, strength, power, and motor control. It explains the basic principles involved in the reasonable application of compression garments in connection with different kinds of exercise, and describes the essential mechanisms of how compression garments work in a reader-friendly format that addresses the needs of researchers, athletes and coaches alike.

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.

Download or read book Handbook of Sports Medicine and Science written by Margo Mountjoy and published by John Wiley & Sons. This book was released on 2014-10-06 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new International Olympic Committee (IOC) handbook covers the science, medicine and psycho-social aspects of females in sports at all levels of competition. Each chapter focuses on the specific issues that female athletes confront both on and off the field, such as bone health, nutritional recommendations, exercise/competition during menstruation and pregnancy, and much more. Fully endorsed by the IOC and drawing upon the experience of an international team of expert contributors, no other publication deals with the topic in such a concise and complete manner. The Female Athlete is recommended for all health care providers for women and girl athletes internationally for all sports and all levels of competition. It is a valuable resource for medical doctors, physical and occupational therapists, nutritionists, and sports scientists as well as coaches, personal trainers and athletes.

Download or read book Handbook of Sports Medicine and Science written by Jonathan C. Reeser and published by John Wiley & Sons. This book was released on 2008-04-15 with total page 245 pages. Available in PDF, EPUB and Kindle. Book excerpt: This addition to the Handbook series is presented in five sections. The first sections covers basic and applied science, including biomechanics, the physiologic demands of volleyball, conditioning and nutrition. The second section looks at the role of the medical professional in volleyball, covering team physicians, pre-participation examination, medical equipment at courtside and emergency planning. The third section looks at injuries - including prevention, epidemiology, upper and lower limb injuries and rehabilitation. The next section looks at those volleyball players who require special consideration: the young, the disabled, and the elite, as well as gender issues. Finally, section five looks at performance enhancement.

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 Essentials of Strength Training and Conditioning written by NSCA -National Strength & Conditioning Association and published by Human Kinetics. This book was released on 2021-06-01 with total page 1720 pages. Available in PDF, EPUB and Kindle. Book excerpt: Developed by the National Strength and Conditioning Association (NSCA) and now in its fourth edition, Essentials of Strength Training and Conditioning is the essential text for strength and conditioning professionals and students. This comprehensive resource, created by 30 expert contributors in the field, explains the key theories, concepts, and scientific principles of strength training and conditioning as well as their direct application to athletic competition and performance. The scope and content of Essentials of Strength Training and Conditioning, Fourth Edition With HKPropel Access, have been updated to convey the knowledge, skills, and abilities required of a strength and conditioning professional and to address the latest information found on the Certified Strength and Conditioning Specialist (CSCS) exam. The evidence-based approach and unbeatable accuracy of the text make it the primary resource to rely on for CSCS exam preparation. The text is organized to lead readers from theory to program design and practical strategies for administration and management of strength and conditioning facilities. The fourth edition contains the most current research and applications and several new features: Online videos featuring 21 resistance training exercises demonstrate proper exercise form for classroom and practical use. Updated research—specifically in the areas of high-intensity interval training, overtraining, agility and change of direction, nutrition for health and performance, and periodization—helps readers better understand these popular trends in the industry. A new chapter with instructions and photos presents techniques for exercises using alternative modes and nontraditional implements. Ten additional tests, including those for maximum strength, power, and aerobic capacity, along with new flexibility exercises, resistance training exercises, plyometric exercises, and speed and agility drills help professionals design programs that reflect current guidelines. Key points, chapter objectives, and learning aids including key terms and self-study questions provide a structure to help students and professionals conceptualize the information and reinforce fundamental facts. Application sidebars provide practical application of scientific concepts that can be used by strength and conditioning specialists in real-world settings, making the information immediately relatable and usable. Online learning tools delivered through HKPropel provide students with 11 downloadable lab activities for practice and retention of information. Further, both students and professionals will benefit from the online videos of 21 foundational exercises that provide visual instruction and reinforce proper technique. Essentials of Strength Training and Conditioning, Fourth Edition, provides the most comprehensive information on organization and administration of facilities, testing and evaluation, exercise techniques, training adaptations, program design, and structure and function of body systems. Its scope, precision, and dependability make it the essential preparation text for the CSCS exam as well as a definitive reference for strength and conditioning professionals to consult in their everyday practice. Note: A code for accessing HKPropel is not included with this ebook but may be purchased separately.

Download or read book The Science and Physiology of Flexibility and Stretching written by David Behm and published by Routledge. This book was released on 2018-11-01 with total page 239 pages. Available in PDF, EPUB and Kindle. Book excerpt: Stretching is a fundamentally important part of sport and exercise, playing a role in improving performance, and preventing injury and rehabilitation, but its scientific underpinnings have, to this point, been overlooked in book publishing. The Science and Physiology of Flexibility and Stretching is the most up-to-date and comprehensive book to cover the underlying physiology and psychology of stretching, critically assessing why, when, and how we should stretch, as well as offering a highly illustrated, practical guide to stretching exercises. Placing stretching in the context of both health and performance, the first section of the book sets out the science behind stretching, critically assessing the benefits, disadvantages, and roles of different types of stretching, exploring the mechanisms behind increasing range-of-movement through stretching and other methods, and offering evidence-based guidance on building stretching into warm-ups. In its second section, the book provides a step-by-step guide to static, dynamic, and PRF stretching exercises for beginners, through recreational athletes, to elite performers. Richly illustrated, and including an online resource, The Science and Physiology of Flexibility and Stretching provides an important scientific enquiry into stretching, and an invaluable reference for any strength and conditioning coach or student, personal trainer, sports coach, or exercise scientist.

Download or read book The Handbook of Sports Medicine and Science written by Niels H. Secher and published by John Wiley & Sons. This book was released on 2009-04-08 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume in the Handbook of Sports Medicine and Science series delivers up-to-date scientific knowledge alongside practical applications in rowing, making it an invaluable resource for researchers, coaches and rowers of all abilities. Published under the auspices of the International Olympic Committee, in collaboration with the International Rowing Federation (FISA), Rowing: Provides key knowledge of the historical, nutritional and psychological aspects of rowing Offers ground-breaking physiological insights which can help shape future training methodologies Features a rowing periodization plan to help trainers and athletes create comprehensive and effective training programs, racing plans and tactics. Rowing brings together internationally renowned experts with experience in competitive rowing and sports medicine, making this the complete handbook of medicine, science and practice in rowing.

Download or read book Ergonomics in Sport and Physical Activity written by Thomas Reilly and published by Human Kinetics. This book was released on 2009-09-22 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ergonomics in Sport and Physical Activity: Enhancing Performance and Improving Safety is also available as an e-book. The e-book is available at a reduced price and allows readers to highlight and take notes throughout the text. When purchased through the Human Kinetics site, access to the e-book is immediately granted when the order is received.Ergonomics in Sport and Physical Activity: Enhancing Performance and Improving Safety is the first text to provide an in-depth discussion of how the principles of ergonomics can be applied in the context of sport and other physical activities to reduce injury and improve performance. The textblends concepts from biomechanics, physiology, and psychology as it shows how ergonomics is applied to physical activity. This comprehensive text outlines methods for assessing risk in and procedures for dealing with stress, eliminating hazards, and evaluating challenges posed in specific work or sport environments. It discusses issues such as the design of effective equipment, clothing, and playing surfaces; methods of assessing risk in situations; and staying within appropriate training levels to reduce fatigue and avoid overtraining. The text not only examines sport ergonomics but also discusses ergonomic considerations for physically active special populations. Ergonomics in Sport and Physical Activity explains what ergonomics is, how ergonomists solve practical problems in the workplace, and how principles of ergonomics are applied in the context of sport and other physical activities when solving practical problems related to human characteristics and capabilities. The text shows readers how to improve performance, achieve optimal efficiency, enhance comfort, and reduce injuries by exploring topics such as these: Essential concepts, terms, and principles of ergonomics and how these relate to physical activity Physical properties of the body and the factors limiting performance Interactions between the individual, the task, and the environment Injury risk factors in relation to body mechanics in various physical activities Injury prevention and individual protection in the review of sports equipment and sports environments Comfort, efficiency, safety, and details of systems criteria in equipment design This research-based text uses numerous practical examples, figures, charts, and graphs to bring the material to life. In addition, descriptions of technological advances show where we have been and how technology has advanced the field. Through the book’s discussion of the various stressors and adaptive mechanisms, readers will learn how to cope with various environmental conditions. They will also learn how various training modes can be used to alter sport-specific capabilities and enhance performance. Presenting a wide range of approaches, theoretical models, and analytical techniques, Ergonomics in Sport and Physical Activity: Enhancing Performance and Improving Safety illustrates the potential for ergonomics to be extended across recreation, competitive sport, and physically active work environments. Bridging the gap between ergonomics and exercise science, this unique text will assist both health care and exercise professionals in developing an improved awareness of how human capabilities are best matched to physical activities.

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 The Olympic Textbook of Medicine in Sport written by Martin P. Schwellnus and published by John Wiley & Sons. This book was released on 2009-01-26 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive new volume in the Encyclopaedia of SportsMedicine series, published under the auspices of the InternationalOlympic Committee, delivers an up-to-date, state of the artpresentation of the medical conditions that athletes may sufferfrom during training and competition. Presented in a clear style and format, The Olympic Textbookof Medicine in Sport, covers not only the basic approach totraining, monitoring training and the clinical implications ofexcessive training, but also deals with all the major systems inthe body, and focuses on medical conditions that athletes maysuffer from in each system. Medical conditions in athletes withdisabilities, genetics and exercise and emergency sports medicineare also uniquely examined. The Olympic Textbook of Medicine in Sport draws on theexpertise of an international collection of contributors who arerecognized as leaders in their respective fields. The systematic approach followed in the book will make itinvaluable to all medical doctors and other health personnel whoserve athletes and sports teams. Sports practitioners are providedwith a clinical approach to the prevention, diagnosis and treatmentof common and less common medical problems encountered by athletes.This volume should be kept close at hand for frequentconsultation.

Download or read book The Psychology of Sports Coaching written by Richard Thelwell and published by Routledge. This book was released on 2016-07-15 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the first book to offer a comprehensive review of current research in the psychology of sports coaching. It provides detailed, critical appraisals of the key psychological concepts behind the practice of sports coaching and engages with contemporary debates in this field. Organised around three main themes, it discusses factors affecting the coaching environment; methods for enhancing coach performance; and how to put theory into practice through coaching work. Written by an international team of researchers and practitioners at the cutting edge of psychology and coaching, each chapter introduces a key concept, defines key terms, provides a comprehensive literature review, and considers implications for future research and applied practice. Encompassing the latest developments in the field, it addresses topics such as: the theory behind effective coaching creating performance environments promoting psychological well-being developing resilience through coaching transformational leadership and the role of the coach. The Psychology of Sports Coaching: Research and Practice is an indispensable resource for sport psychologists and sports coaches, and is essential reading for all students and academics researching sport psychology.

Download or read book Therapeutic Exercise written by Carolyn Kisner and published by F.A. Davis. This book was released on 2022-10-17 with total page 3368 pages. Available in PDF, EPUB and Kindle. Book excerpt: The premier text for therapeutic exercise Here is all the guidance you need to customize interventions for individuals with movement dysfunction. You’ll find the perfect balance of theory and clinical technique—in-depth discussions of the principles of therapeutic exercise and manual therapy and the most up-to-date exercise and management guidelines.

Download or read book Injury Prevention in Youth Football Players written by Hanna Lindblom and published by Linköping University Electronic Press. This book was released on 2019-10-08 with total page 105 pages. Available in PDF, EPUB and Kindle. Book excerpt: Background With 17–35% of all 14-year-olds in Sweden being active in football, injuries do occur, most frequently during match play. Based on knowledge of injury mechanisms and risk factors, different injury prevention exercise programmes (IPEPs) have been developed. In this thesis, the Swedish IPEP Knee Control was used as a model for injury preventive training. Aim The overall aim of this thesis was to improve our understanding of the effects of the Knee Control injury prevention exercise programme on sports performance and jump-landing technique, as well as exploring programme implementation and coach experiences of using the programme in youth football. Methods Studies I and IV were cluster-randomised trials focusing on the performance effects of Knee Control. Study I included four teams with 41 female youth football players (mean age 14). The intervention group used Knee Control twice weekly for 11 weeks, whereas the control group teams did their usual training. Knee Control includes six different exercises at four levels of difficulty and with partner exercises and is meant to be used during warm-up at every training session. Performance was tested using a battery of balance, agility, jump and sprint tests at baseline and follow-up at an indoor venue. Study IV had a similar set-up but included two different interventions: Knee Control and a new, further-developed version of the programme, Knee Control+, which were studied during an eight-week intervention involving eight youth football teams, four male, four female (mean age 14), with 77 players. Similar, but not identical, performance tests were used in Study IV, along with drop vertical jumps and tuck jump assessment to assess jump-landing technique. Studies II and III focused on the implementation context. Study II was questionnaire based, using the RE-AIM framework covering the reach, effectiveness, adoption, implementation and maintenance of Knee Control. Coaches for female youth teams (n=352), one representative of the national football association and representatives of eight district football associations responded to web-based questionnaires. Data collection was performed two years after the nation-wide implementation of Knee Control started. Study III was a qualitative study that followed up on the results of Study II. Interviews were conducted with 20 coaches for female football teams and analysed using qualitative content analysis. The interviews focused on factors that affected the adoption and use of Knee Control. All 20 coaches had experience of Knee Control. Results Limited positive effects were seen on jump-landing technique in girls, with the total tuck jump assessment score improving, as well as two separate criteria, the number of jumps accomplished during the 10-second test and additionally an increased knee-flexion angle upon landing from a drop vertical jump. No improvements on the performance tests were found in either Study I or Study IV. Both studies, however, suffered from low player compliance with the IPEPs and as a result low training dosage. No major differences in results were seen between Knee Control and Knee Control+ in Study IV. Study II showed that 91% of the responding coaches were familiar with Knee Control, they perceived the programme to be effective, 74% had started to use it, and it was fairly well maintained over time. However, only one third of the coaches used the programme every week and few used the whole programme. There were no formal policies for programme implementation and use in the district football associations and clubs. Study III showed that the coach was vital for programme use but needed social support, buy-in from players, resources and a feasible programme to facilitate programme adoption and use. When facing challenges with Knee Control implementation and use, the coaches did their best to work around these obstacles; for example, by modifying the programme content or dosage. Conclusions In conclusion, limited positive effects on jump-landing technique were seen in girls, potentially affecting risk factors for injury positively. No clinically meaningful effects from Knee Control or Knee Control+ were seen on performance tests as measured in the studies in either boys or girls. This may be related to the low training dosage. The high programme reach, perceived effectiveness, adoption and fairly high maintenance of Knee Control were positive. The modifications of programme content and/or dosage were concerning but will hopefully decrease with a more user-friendly programme. Bakgrund I och med att 17–35% av alla 14-åringar i Sverige är aktiva inom fotboll så uppkommer en del skador, oftast i samband med matcher. Utifrån kunskap om skadesituationer och riskfaktorer för skador har olika skadeförebyggande träningsprogram utvecklats. I denna avhandling användes det svenska skadeförebyggande programmet Knäkontroll som modell för skadepreventiv träning. Syfte Det övergripande syftet var att öka förståelsen för effekterna av Knäkontroll på prestationsförmåga och hopp-landningsteknik, programmets implementering och tränarnas erfarenheter av att använda programmet inom svensk ungdomsfotboll. Metod Studie I och Studie IV var klusterrandomiserade studier som undersökte effekterna på prestationsförmågan av att träna Knäkontroll. Studie I inkluderade 41 flickfotbollsspelare (genomsnittsålder 14 år). Interventionsgruppen använde Knäkontroll två gånger per vecka i 11 veckor, medan kontrollgruppen tränade som vanligt. Knäkontroll involverar sex olika övningar på fyra svårighetsgrader och med tillhörande parövningar och ska användas vid uppvärmningen inför varje fotbollsträning. Prestationsförmågan testades inomhus med ett batteri av olika tester för balans, snabbhet, hopp- och sprintförmåga vid baslinje och uppföljning. Studie IV hade ett likartat upplägg men inkluderade två olika interventioner: Knäkontroll och en vidareutvecklad version av programmet, Knäkontroll+. Studien pågick åtta veckor i åtta fotbollslag (fyra pojk-, fyra flicklag) med 77 spelare (genomsnittsålder 14 år). Liknande test för prestationsförmåga användes som i studie I, men även drop vertical jumps och tuck jumps för att bedöma hopp-landningsteknik. Studie II och Studie III fokuserade på implementeringskontexten, det vill säga implementeringen av Knäkontroll ute i fotbollslag. Studie II var en enkätstudie som med hjälp av ramverket RE-AIM (reach, effectiveness, adoption, implementation and maintenance) utvärderade implementeringen av Knäkontroll. Tränare för flickfotbollslag (n=352), en representant för Svenska Fotbollförbundet och representanter för åtta distriktsförbund besvarade de webbaserade enkäterna. Datainsamlingen gjordes två år efter att den nationella implementeringen av Knäkontroll startade. Studie III var en kvalitativ studie som fördjupade resultaten av Studie II. Intervjuer genomfördes med tjugo tränare för flick- och damfotbollslag och analyserades med kvalitativ innehållsanalys. Intervjuerna fokuserade på faktorer som påverkade tränarnas upptag och användning av Knäkontroll. Alla tränare hade erfarenhet av Knäkontroll sedan tidigare. Resultat Begränsad positiv effekt sågs på hopp-landningsteknik bland flickorna i studie IV, med en förbättrad totalpoäng på tuck jumps, på två kriterier i tuck jump, ökat antal hopp under testets 10 sekunder samt en ökad knäflexionsvinkel vid landning från drop vertical jumps. Ingen förbättring av prestationsförmågan sågs i Studie I eller Studie IV. I båda studierna var spelarnas närvaro på fotbollsträningar låg, vilket även gav en låg träningsdos av Knäkontroll. Inga större skillnader i resultat sågs mellan Knäkontroll och Knäkontroll+ i Studie IV. Studie II visade att 91% av tränarna kände till Knäkontroll, att tränarna upplevde att programmet var effektivt, 74% hade också börjat använda programmet och användandet bibehölls också förhållandevis väl över tid. Däremot använde endast 1/3 av tränarna programmet varje vecka och få använde hela programmet. Det saknades riktlinjer för programmets implementering och användning inom distriktsförbund och klubbar. Studie III visade att tränaren var oumbärlig för programmets användning men behövde mer socialt stöd, intresse från spelarna och resurser utöver ett användarvänligt program för att underlätta det preventiva arbetet. När tränarna ställdes inför utmaningar gjorde de sitt bästa för att kringgå problemen, till exempel genom att modifiera programmets innehåll eller dosering, för att ändå kunna använda programmet. Konklusion Sammanfattningsvis sågs begränsade positiva effekter på hopplandningsteknik hos flickorna, vilket möjligen påverkar riskfaktorerna för skada positivt. Inga kliniskt meningsfulla effekter av Knäkontroll eller Knäkontroll+ sågs på prestationstesterna hos varken pojkar eller flickor. Detta kan vara relaterat till den låga träningsdosen. Knäkontrollprogrammets stora spridning, högt skattade effektivitet, höga upptag och förhållandevis goda bibehållande var positivt. De modifieringar av programmets innehåll och/eller dosering som sågs var oroväckande men kan förhoppningsvis minska av ett mer användarvänligt program.