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 Effects of Two Different Fatigue Protocols on Lower Extremity Kinematics and Kinetics During an Unanticipated Running Stop jump written by David L. Quammen and published by . This book was released on 2010 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effects of Fatigue on Lower Extremity Kinetics and Kinematics in Subjects with Known Ankle Instability written by Lindsay Ellen Clayton and published by . This book was released on 2015 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of this study was to evaluate biomechanical differences between healthy subjects and those with ankle instability during the gradual onset of lower extremity fatigue from a landing activity. An understanding of these differences is needed in order to prevent future injury to or further debilitation in individuals with ankle instability. A functional fatiguing activity was designed to focus fatigue on the quadriceps muscles, as those are the muscles most frequently fatigued during sport. Measures were taken throughout the progression of fatigue with a force plate and a motion tracking system and included vertical ground reaction force and lower extremity kinetics, kinematics, and energetics. The time required to reach self-reported fatigue and a balance assessment, the Star Excursion Balance Test, before and after the onset of fatigue was also recorded. Significant differences were observed between groups in peak ground reaction force, ground reaction force impulse, and frontal plane ankle joint impulse. Results indicated that subjects with ankle instability not only exhibited a different baseline for most measurements than normal subjects, but also managed the progression of fatigue differently. With this information and information from further studies, recommendations and/ or training schemes could be made and implemented to help those with ankle instability avoid recurrent injuries.
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2007 with total page 924 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Functional Vs Isokinetic Fatigue Protocol written by Erik A. Wikstrom and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT (con't) : Two way repeated measures ANOVA revealed no significant differences when comparing isokinetic to functional fatigue values for vertical TTS [F(1,19)= 3.93, p=.538], medial/lateral TTS[F(1,19)= .287, p=.598], anterior/posterior TTS [F(1,19)= .001, p=.978], toe touch GRF [F(1, 19)=.121, p=.286], and heel strike GRF (F=3.673, p=.070). Also, no significant differences were revealed when comparing the fatigue protocols for ankle Dorsiflexion [F(1,19)= .06, p=.803], knee flexion [F(1,19)= .21, p=.652], and knee valgum [F(1,19)= .79, p=.386]. The results of this investigation suggest that the specific fatigue protocol used did not impair dynamic stability and that future research should focus on fatigue that occurs during athletic competition and the correctness of the measure of time to stabilization.
Download or read book ACL Injuries in the Female Athlete written by Frank R. Noyes and published by Springer. This book was released on 2018-09-07 with total page 658 pages. Available in PDF, EPUB and Kindle. Book excerpt: This successful book, now in a revised and updated second edition, reviews all aspects of anterior cruciate ligament (ACL) injuries in female athletes, with the focus on complete, noncontact ACL injuries. The opening section discusses anatomy and biomechanics and explains the short- and long-term impacts of complete ACL ruptures, including long-term muscle dysfunction and joint arthritis. Risk factors and possible causes of the higher noncontact ACL injury rates in female athletes compared with male athletes are then discussed in depth. Detailed attention is devoted to neuromuscular training programs and their effectiveness in reducing noncontact ACL injury rates in female athletes, as well as to sports-specific ACL injury prevention and conditioning programs of proven value. Rehabilitation programs after ACL injury and reconstruction that reduce the risk of a future injury are explored, and the concluding section looks at worldwide implementation of neuromuscular ACL injury prevention training and future research directions. The book will be of value to orthopedic surgeons, physical therapists, athletic trainers, sports medicine primary care physicians, and strength and conditioning specialists.
Download or read book The Effect of Load on the Kinetics and Kinematics of the Lower Extremity During Landing written by Michael Sullivan and published by . This book was released on 2021 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt: Purpose: To understand the differences in the lower extremity kinetics and kinematics as load increases during jump landings. Methods: Ten male participants (20.4 years ℗ł 2.41 years, 108.8kg ℗ł 14.02kg) took part in two testing sessions. The first testing session involved testing each participant's 1-repetition max in the hexagonal barbell deadlift. The second testing session involved the data collection of the jumping trials for each participant. Participants performed their countermovement jumps under seven randomized conditions. Six of the conditions involved the hex bar using loads equivalent to 10, 20, 30, 40, 50, and 60% estimated 1-repetition max of the hexagonal barbell deadlift. The seventh condition was an unloaded (bodyweight or 0%) countermovement jump. Peak values for joint powers, moments, angles, and velocities were recorded for the ankle, knee, and hip for all participants and conditions. A repeated measures ANOVA was used to compare differences among results. Results: Significant differences (p
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 Potential Effects and Mechanisms of Traditional Chinese Non Pharmacological Therapy for Nero musculoskeletal Disorders written by Min Fang and published by Frontiers Media SA. This book was released on 2023-10-18 with total page 329 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Decision Making on Landing Neuromechanics as a Function of Task and Sex written by Melissa A. Mache and published by . This book was released on 2010 with total page 95 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although the incidence of non-contact anterior cruciate ligament (ACL) injuries is greater among women than men athletes, the factors that contribute to this greater risk of injury are not well understood. One relevant question is whether decision making during landing influences the biomechanical and neuromuscular factors thought to contribute to ACL injury, and whether these effects differ as a function of task and sex. The purpose of this study was thus to examine the effects of decision making on the neuromechanics of two-footed landing tasks in women and men. Twenty-nine healthy young adults (13 women; 16 men) completed a series of two-footed drop landing and drop-jump tasks under preplanned and decision-making conditions. Biomechanical and electromyographic data were collected. Repeated measures ANOVA was used to determine the effect of decision making on hip, knee, and ankle kinematics and kinetics, and on proactive and reactive muscle activity, as a function of task and sex. Multiple linear regression was used to assess the relationship between select knee biomechanical variables and proactive muscle activity. Decision making had numerous effects on lower extremity kinematics, kinetics, and neuromuscular control, many of which were task-specific. Under decision-making conditions, individuals exhibited similar joint postures at initial ground contact and similar amounts of reactive muscle activity across tasks. The majority of the observed modifications in neuromechanics suggested a default towards the preplanned drop landing strategy under decision-making conditions. Some effects of decision making on joint mechanics and reactive muscle activity varied with sex, although the extent to which these dissimilar effects modified relative ACL loading is not known. Knee flexion at initial contact, peak knee abduction, and peak knee adduction moment were significantly related to the proactive activity of several, primarily lateral, muscles of the lower extremity, independent of task and decision-making condition. These results indicate that decision making influences landing mechanics and neuromuscular control and that these effects are generally task-dependent and, in some cases, sex-dependent. The results also suggest that, in both women and men, drop landings and drop-jumps performed under decision-making conditions are no more dangerous, with respect to ACL loading, than preplanned drop landings.
Download or read book Lower Extremity Neuromechanics During a Forward side Jump Following Functional Fatigue in Patients with Ankle Instability written by Hyunsoo Kim and published by . This book was released on 2015 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ankle instability (AI) and fatigue impair neuromuscular control as well as dynamic joint stability of the lower extremity. No one has comprehensively examined the effects of AI and fatigue on neuromechanics of the lower extremity during a functional activity. Deficits associated with AI and fatigue could be additive in increasing the risk for injury in patients with AI. PURPOSE: To examine the interaction of AI and fatigue on lower extremity muscle activity, kinematic, and kinetic patterns during a forward-side jump. METHODS: 25 AI (23.3 +-2.5 yrs, 176.5 +- 10.5 cm, 70.9 +- 11.4 kg), and 25 matched control subjects (23.7 +- 2.5 yrs, 175.0 +- 10.8 cm, 70.3 +- 12.8 kg) were categorized according to the Foot and Anlke Ability Measure (FAAM) (ADL: 84.3 +- 7.6%, Sport: 63.6 +- 8.6%) and the modified Anlke Instability Instrument (MAII) (3.7 +- 1.2). Fifty-nine reflective markers were place over anatomical landmarks and eight electromyography (EMG) electrodes were placed on tibialis anterior (TA), peroneus longus (PL), medical gastrocmedius (MG), medical hamstring (MH), vastus lateralis (VL), adductor longus (AL), gluteus medius (GMed), and gluteus maxiums (GMax) muscles in the involved leg. Subjects performed five forward-side jumps on a force plate before and after functional fatiguing exercises. To induce fatigue, subjects began 5-min incremental running on a treadmill between 5 and 6 mph. Next, subjects performed 20-second lateral counter movement jumps (CMJ), and 20 vertical CMJs. After each fatigue cycle, subjects performed one max vertical jump. Subjects repeated three exercises until Borg's rating of perceived exertion (RPE) reached 17 and the vertical jump height fell below 80% of their max jump height. Functional analysis of variance (FANOVA) (p
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 Effect of Functional Fatigue on Leg Spring Stiffness During Drop Landings written by Nicholas M. G. Martin and published by . This book was released on 2003 with total page 130 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 The Effect of Lower Extremity Fatigue on Shock Attenuation During Landing written by Evan Coventry and published by . This book was released on 2004 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Kinetic and Kinematic Analysis of the Drop Jump Following a Functional Fatigue Protocol written by Robert L. Sterner and published by . This book was released on 2001 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effects of Landing on Lower Extremity Function written by Janet Sue Dufek and published by . This book was released on 1988 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt:
