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Jumpers knee

Logan Wade, Glen Lichtwark, Dominic James Farris
The preferred movement strategies that humans choose to produce work for movement are not fully understood. Previous studies have demonstrated an important contribution of elastic energy stored within the Achilles tendon (AT) during jumping. This study aimed to alter energy available for storage in the AT to examine changes in how jumpers distribute work among lower limb joints. Participants (n = 16) performed maximal and sub-maximal jumps under two paradigms, matched for increasing total work output by manipulating jump height or adding body mass...
February 2, 2018: Scientific Reports
Steffen Willwacher, Johannes Funken, Kai Heinrich, Ralf Müller, Hiroaki Hobara, Alena M Grabowski, Gert-Peter Brüggemann, Wolfgang Potthast
The use of technological aids to improve sport performance ('techno doping') and inclusion of Paralympic athletes in Olympic events are matters of ongoing debate. Recently, a long jumper with a below the knee amputation (BKA) achieved jump distances similar to world-class athletes without amputations, using a carbon fibre running-specific prosthesis (RSP). We show that athletes with BKA utilize a different, more effective take-off technique in the long jump, which provided the best athlete with BKA a performance advantage of at least 0...
November 22, 2017: Scientific Reports
Terry Cox, Tom Sneed, Herb Hamann
STUDY DESIGN: Case Report. BACKGROUND: The purpose of this case report is to describe nerve mobilization in the treatment of lower extremity neuropathic pain in a female collegiate long jumper. CASE DESCRIPTION: A 21 year-old long jumper presented 7 months after onset of ankle and leg pain. She complained of "aching" pain over the lateral ankle, radiating proximally to just superior to the lateral knee. Neurodynamic testing of the sural and superficial branch of the fibular nerves was positive...
September 22, 2017: Physiotherapy Theory and Practice
Camilla Kjær Cullum, Peter Hung Thanh Tran, Simon Døssing
Running is one of the most popular sports among the adult Danish population. Overuse injuries of the knee, such as runners knee, jumpers knee, patello-femoral pain syndrome and patello-femoral pre-arthrosis, are common and cause reduction of the health beneficial physical activity. Treatment should primarily focus on adjustment of training habits and physiotherapeutic guided rehabilitation. Other treatment options include changing landing pattern during running, corticosteroid injections, non-steroid anti-inflammatory drugs and ultimately surgery...
September 18, 2017: Ugeskrift for Laeger
Hans-Peter Wiesinger, Florian Rieder, Alexander Kösters, Erich Müller, Olivier R Seynnes
Introduction: During running and jumping activities, elastic energy is utilized to enhance muscle mechanical output and efficiency. However, training-induced variations in tendon spring-like properties remain under-investigated. The present work extends earlier findings on sport-specific profiles of tendon stiffness and cross-sectional area to examine whether years of distinct loading patterns are reflected by tendons' ability to store and return energy. Methods:Ultrasound scans were performed to examine the morphological features of knee extensor and plantar flexor muscle-tendon units in elite ski jumpers, distance runners, water polo players, and sedentary controls...
2017: Frontiers in Physiology
Matthias Brockmeyer, Alexander Haupert, Dieter Kohn, Olaf Lorbach
Chronic patellar tendinosis (jumper's knee) is a common problem among athletes. Conservative treatment is successful in most of the cases including, among others, the use of nonsteroidal anti-inflammatory drugs, local cryotherapy, eccentric muscle training, limitation of sports activity, and local infiltration. In approximately 10% of conservatively treated patients, conservative treatment fails and surgery is required. Different open and arthroscopic surgical techniques have been described in the literature...
December 2016: Arthroscopy Techniques
Eirik S Salvesen, Ketil J Holen
The objective of this study was to assess if the Victorian Institute of Sport Assessment (VISA) questionnaire was suitable in the evaluation of patients from a mixed population with normal levels of sports activity, and if neovascularization of the patellar tendon demonstrated by color flow imaging (CFI) was more frequent in patients with lasting symptoms after surgical treatment for jumpers knee (JK). This study was conducted at St. Olavs Hospital, University Hospital of Trondheim, Norway, and included 21 men and 18 women who were operated for JK...
December 2016: Journal of Sports Science & Medicine
Julien Caquot, Anaick Perrochon, Jean-Luc Bugeaud, Xavier Dumélié, François Duzou, Jean-Christophe Daviet
OBJECTIVE: Jumper's knee is extremely common among basketball players of high-level even in the youth categories, with adverse consequences for the continuation of the practice. To establish a preventive educational action, we have sought to examine the cognitive representations of the players concerning the patellar tendinopathy. OBJECTIVE: Raise an appraisal of presentations and ideas accepted from the basketball players participants in the championship of France hope concerning the prevention of the patellar tendinothy (PT)...
September 2016: Annals of Physical and Rehabilitation Medicine
Julien Caquot, Anaick Perrochon, Jean-Luc Bugeaud, Xavier Dumélié, Marc Pajon, Jean-Christophe Daviet
OBJECTIVE: The jumper-Knee is common among basketball player's with adverse consequences on the practice. For the sake of prevention, it seems interesting to study its importance in the younger categories. The aim of the present study was to collect epidemiological data on pain below patella in France hope Championship basketball. MATERIAL AND METHODS: We conducted a sectional survey by questionnaire, a given day. We sent ten questionnaires to the attention of players and a questionnaire to the attention of the coaches of the 18 participating training centers at the Championship of France pro A hope...
September 2016: Annals of Physical and Rehabilitation Medicine
Komsak Sinsurin, Roongtiwa Vachalathiti, Wattana Jalayondeja, Weerawat Limroongreungrat
BACKGROUND: Jump landing is a complex movement in sports. While competing and practicing, athletes frequently perform multi-planar jump landing. Anticipatory muscle activity could influence the amount of knee flexion and prepare the knee for dynamic weight bearing such as landing tasks. OBJECTIVES: The aim of the present study was to examine knee muscle function and knee flexion excursion as athletes naturally performed multi-direction jump landing. MATERIALS AND METHODS: Eighteen male athletes performed the jump-landing test in four directions: forward (0°), 30° diagonal, 60° diagonal, and lateral (90°)...
June 2016: Asian Journal of Sports Medicine
Stephan Geisler, Andreas H Alt, Thorsten Kreutz
No abstract text is available yet for this article.
May 2016: Medicine and Science in Sports and Exercise
Alexander N Eagles, Mark G Sayers, Dale I Lovell
BAKGROUND: The purpose of this study was to examine how hip, knee and ankle kinetics and kinematics influence effective impulse production during countermovement jumps. METHODS: Eighteen semi-professional soccer players (22.8±2.2 years) volunteered to participate in the study. Participants completed three maximal countermovement jumps on two force platforms (1000 Hz) that were linked to a nine camera infrared motion capture system (500 Hz). RESULTS: Kinetic and kinematic data revealed jumpers who fail to achieve uniform ground reaction force curves that result in optimal impulse production during their jump always display hip adduction and or hip internal rotation during the concentric phase of the countermovement jump...
May 2017: Journal of Sports Medicine and Physical Fitness
Athanasios Tsoukos, Gregory C Bogdanis, Gerasimos Terzis, Panagiotis Veligekas
Tsoukos, A, Bogdanis, GC, Terzis, G, and Veligekas, P. Acute improvement of vertical jump performance after isometric squats depends on knee angle and vertical jumping ability. J Strength Cond Res 30(8): 2250-2257, 2016-This study examined the acute effects of maximum isometric squats at 2 different knee angles (90 or 140°) on countermovement jump (CMJ) performance in power athletes. Fourteen national-level male track and field power athletes completed 3 main trials (2 experimental and 1 control) in a randomized and counterbalanced order 1 week apart...
August 2016: Journal of Strength and Conditioning Research
Iris Sophie Albers, Johannes Zwerver, Ronald Leo Diercks, Janny Hendrika Dekker, Inge Van den Akker-Scheek
BACKGROUND: Lower extremity tendinopathy is a common sports injury, but it can also affect non-athletes. Because tendinopathy is difficult to treat and has negative effects on the ability to work and quality of life, development of preventive interventions is important. The first step in the Van Mechelen prevention model is to determine the extent of the problem. The primary aim of this study was to determine the incidence and prevalence of lower extremity tendinopathy in a Dutch general practice population...
January 13, 2016: BMC Musculoskeletal Disorders
H van der Worp, H T D van der Does, M S Brink, J Zwerver, J M Hijmans
The literature on the relation between jump biomechanics and jumper's knee indicates that a jump with horizontal displacement poses a threat for developing jumper's knee. Subjects with jumper's knee have been shown to display a stiff landing pattern characterized by a small range of motion. However, up to now only cross-sectional studies have been conducted. 6 teams from sports involving repetitive landing were followed prospectively for 2 years. At baseline athletes performed the Landing Error Scoring System jump and 3D kinematics and kinetics were obtained...
March 2016: International Journal of Sports Medicine
Miroslav Janura, Lee Cabell, Zdenek Svoboda, Milan Elfmark
Between 1992 and 2010, a total of 334 males participated in this study that assessed the differences and relationships between anthropometric variables and lower limb muscle strength in young and adult ski jumpers (n = 207) and Nordic combined (NC, n = 127) athletes. All athletes completed a maximal vertical jump from an in-run position and a maximal relative isometric force (MRIF) of the knee extensor measurement in a laboratory setting. The body mass index (BMI) in young competitors was lower than in adult groups (NC: p < 0...
January 2016: Journal of Strength and Conditioning Research
James H Lubowitz
Jumper's knee is generally managed without surgery, but for patellar distal pole or midsubstance tendonitis (or tendinosis), if surgery is indicated, arthroscopic surgery is as effective as open, with faster return to play.
December 2015: Arthroscopy: the Journal of Arthroscopic & related Surgery
Lauren H Redler, Jonathan P Watling, Elizabeth R Dennis, Eric Swart, Christopher S Ahmad
OBJECTIVES: There is an epidemic of anterior cruciate ligament (ACL) injuries in youth athletes. Poor neuromuscular control is an easily modifiable risk factor for ACL injury, and can be screened for by observing dynamic knee valgus on landing in a drop vertical jump test. This study aims to validate a simple, clinically useful population-based screening test to identify at-risk athletes prior to participation in organized sports. We hypothesized that both physicians and allied health professionals would be accurate in subjectively assessing injury risk in real-time field and office conditions without motion analysis data and would be in agreement with each other...
2016: Physician and Sportsmedicine
Nikos Malliaropoulos, Lena Kakoura, Kostas Tsitas, Dimitris Christodoulou, Alexandros Siozos, Peter Malliaras, Nicola Maffulli
BACKGROUND: flexibility is an important physical characteristic in athletes in terms of performance and injury prevention. Active Range Of Motion (AROM) was assessed in elite Greek track and field athletes. METHODS: prospective cohort study was carried out. In the period 2000-2010, the AROM was measured bilaterally with the Active Knee Extension (AKE) test during an in-season period with a goniometer in 127 athletes. RESULTS: male runners and jumpers had a higher mean AROM than throwers, but this result was not statistically significant...
July 2015: Muscles, Ligaments and Tendons Journal
Carole A Pauli, Melanie Keller, Fabian Ammann, Klaus Hübner, Julia Lindorfer, William R Taylor, Silvio Lorenzetti
Squats, drop jumps, and imitation jumps are commonly used training exercises in ski jumping to enhance maximum force, explosive force, and sport-specific skills. The purpose of this study was to evaluate the kinetics and kinematics of training exercises in ski jumping and to find objective parameters in training exercises that most correlate with the competition performance of ski jumpers. To this end, barbell squats, drop jumps, and imitation jumps were measured in a laboratory environment for 10 elite ski jumpers...
March 2016: Journal of Strength and Conditioning Research
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