Thirty-seven jump-landing biomechanical variables are associated with asymptomatic patellar tendon abnormality and patellar tendinopathy: A systematic review

2020 ◽  
Vol 45 ◽  
pp. 38-55
Author(s):  
Meaghan Harris ◽  
Adrian Schultz ◽  
Michael K. Drew ◽  
Ebonie Rio ◽  
Stuart Adams ◽  
...  
Keyword(s):  
Systematic Review ◽  
Patellar Tendon ◽  
Patellar Tendinopathy ◽  
Jump Landing

Patellar Tendon Straps Decrease Pain and May Alter Lower Extremity Kinetics in Those With Patellar Tendinopathy During Jump Landing

2017 ◽  
Vol 22 (4) ◽  
pp. 51-57 ◽  
Author(s):  
Adam B. Rosen ◽  
Jupil Ko ◽  
Kathy J. Simpson ◽  
Cathleen N. Brown
Keyword(s):  
Lower Extremity ◽  
Patellar Tendon ◽  
Ground Reaction Force ◽  
Reaction Force ◽  
Patellar Tendinopathy ◽  
Jump Landing ◽  
Drop Jumps ◽  
Kinetics Of

Patellar tendinopathy is often managed with a patellar tendon strap, however, their effectiveness is unsubstantiated. The purpose of this study was to determine if straps altered pain or lower extremity kinetics of individuals with patellar tendinopathy during landing. Thirty participants with patellar tendinopathy and 30 controls completed drop jumps with and without patellar tendon straps. Wearing the strap, tendinopathy participants demonstrated significantly decreased pain and reduced knee adductor moment; all participants displayed significantly decreased anterior ground reaction force while wearing a strap. Patellar tendon strapping may reduce pain due to alterations in direction and magnitude of loading.

scholarly journals Therapeutic interventions in children and adolescents with patellar tendon related pain: a systematic review

2018 ◽  
Vol 4 (1) ◽  
pp. e000383 ◽  
Author(s):  
George Cairns ◽  
Timothy Owen ◽  
Stefan Kluzek ◽  
Neal Thurley ◽  
Sinead Holden ◽  
...  
Keyword(s):  
Systematic Review ◽  
Usual Care ◽  
Children And Adolescents ◽  
Patellar Tendon ◽  
Local Anaesthetic ◽  
Patellar Tendinopathy ◽  
Controlled Study ◽  
Data Synthesis ◽  
Related Disorder ◽  
Persistent Symptoms

ObjectiveEvaluate effectiveness and harms of interventions for patellar tendon related pain in children and adolescents.DesignSystematic review and meta-analysis.Data sourcesMedline via Pubmed, Embase via OVID, CINAHL via Ebsco, SportDiscus up until 24 November 2017 were searched.Eligibility criteria for selecting studiesInclusion criteria were (1) controlled or randomised controlled clinical trials (RCTs), (2) participants with diagnosis of patellar tendon related disorder, (3) participants≤18 years of age at enrolment and (4) published in a peer-reviewed English or Scandinavian language journal.ResultsOf 530 studies identified, eight were included after screening, with three included in data synthesis. To be included in data synthesis, we required studies to have included (and have data available for) a minimum of 10 participants under 18 years. All studies were rated as being at high risk of bias. For adolescents with patellar tendinopathy, one RCT compared eccentric exercises to usual care and found no difference between groups. In adolescents with Osgood-Schlatter disease (OSD), injection of local anaesthetic with dextrose proved superior to either usual care or local anaesthetic alone (three armed RCTs). In a retrospective case controlled study in adolescents with OSD, surgery provided no benefit over conservative management in terms of persistent symptoms and had a higher complication rate.ConclusionThere is weak evidence to support the use of dextrose injection with local anaesthetic and no evidence to support the use of specific types of exercises to treat children/adolescents with OSD/patellar tendinopathy. Until further evidence arises, clinicians should include load modification and advise on a return to sport based on symptoms.

scholarly journals Patellar Tendon Force Differs Depending on Jump-Landing Tasks and Estimation Methods

2022 ◽  
Vol 12 (1) ◽  
pp. 488
Author(s):  
Sébastien Garcia ◽  
Nicolas Delattre ◽  
Eric Berton ◽  
Guillaume Rao
Keyword(s):  
Patellar Tendon ◽  
Vertical Jump ◽  
Vertical Component ◽  
Forward Direction ◽  
Estimation Methods ◽  
Patellar Tendinopathy ◽  
Static Optimization ◽  
Jump Landing ◽  
Volleyball Players ◽  
Tendon Force

Patellar tendinopathy is a chronic overuse injury of the patellar tendon which is prevalent in jump-landing activities. Sports activities can require jumping not only with a vertical component but also in a forward direction. It is yet unknown how jumping in the forward direction may affect patellar tendon forces. The main purpose of this study was to compare PTF between landings preceded by a vertical jump and a forward jump in volleyball players. The second purpose was to compare two different estimation methods of the patellar tendon force. Fifteen male volleyball players performed vertical and forward jump-landing tasks at a controlled jump height, while kinetics and kinematics were recorded. Patellar tendon forces were calculated through two estimation methods based on inverse dynamic and static optimization procedures, using a musculoskeletal model. Results showed that forward jump-landing generated higher patellar tendon forces compared to vertical jump-landing for both estimation methods. Surprisingly, although the static optimization method considered muscle co-contraction, the inverse kinematic method provided statistically significant higher patellar tendon force values. These findings highlight that limiting the forward velocity component of the aerial phase appears to reduce the load on the patellar tendon during landing and may help to prevent patellar tendinopathy.

Treatment Options for Patellar Tendinopathy: A Systematic Review

2017 ◽  
Vol 33 (4) ◽  
pp. 861-872 ◽  
Author(s):  
Joshua S. Everhart ◽  
Devon Cole ◽  
John H. Sojka ◽  
John D. Higgins ◽  
Robert A. Magnussen ◽  
...  
Keyword(s):  
Systematic Review ◽  
Treatment Options ◽  
Patellar Tendinopathy

Distalising tibial tubercle osteotomy decreases patellar tendon force — A treatment rationale for recalcitrant patellar tendinopathy

The Knee ◽  
2020 ◽  
Vol 27 (3) ◽  
pp. 871-877 ◽  
Author(s):  
Michael J. Dan ◽  
Joseph Cadman ◽  
James McMahon ◽  
William C.H. Parr ◽  
David Broe ◽  
...  
Keyword(s):  
Patellar Tendon ◽  
Patellar Tendinopathy ◽  
Tibial Tubercle ◽  
Tibial Tubercle Osteotomy ◽  
Tendon Force

scholarly journals Morpho-textural changes of the patellar tendon in professional volleyball players: a six month longitudinal study

2019 ◽  
Vol 02 (02) ◽  
pp. 126-126
Author(s):  
de Groot Ferrando A.
Keyword(s):  
Patellar Tendon ◽  
Effect Size ◽  
Repeated Measures ◽  
Structural Changes ◽  
Patellar Tendinopathy ◽  
Average Effect ◽  
Average Effect Size ◽  
Significant Difference ◽  
Volleyball Players ◽  
Textural Changes

Abstract Introduction Tendinopathy is a term used to describe a clinical presentation of pain and dysfunction, which, at times, is accompanied by pathologic structural changes in the tendon matrix. Jumper's knee has been studied for some time, however the etiology is still unknown. The deep fibers of the proximal region are the most affected area in tendinopathies affecting the patellar tendon. Ultrasound (US) scanning may have the greatest sensitivity for confirming clinically diagnosed patellar tendinopathy compared with other imaging techniques such as magnetic resonance. Some studies have found that a minimum of six months is required to observe significant structural changes, although other studies reveal that structural changes can be visible in a shorter period of time. Thus, sonography has been used to evaluate quantitative variables such as thickness, echogenicity, texture measures and the internal tendon matrix. Objective The purpose of this study was to evaluate the sonographic behavior of morpho-textural changes of the patellar tendon in professional male volleyball players over a one year season. Material and Methods This is an observational, longitudinal and analytical study. A sample of 66 patellar tendons from 33 volleyball players of the Spanish super league was recruited, with an average of: 28 years, 86kg and 192cm. An ultrasound scan was performed using the Sonosite Titan ultrasound system, L38, 5–10 MHz, with a cross section of 5mm from the lower pole of the patella. Two depths were analyzed: a.39mm: echogenicity, echogenicity variation, circularity, width and thickness. b.24mm: entropy and contrast. Statistical analysis and analysis of variance (ANOVA) was performed for repeated measures and, in addition, the effect size was calculated with Cohen's d. The confidence interval was 95%. SPSS Statistics software was used. Results For textural variables: contrast increased significantly with an average effect size, and entropy showed no significant difference. Circularity was significantly lower. Width was shown to be significantly greater, with an average effect size, while thickness was reduced significantly. Regarding echogenicity, no significant changes were detected and variation in echogenicity did not show significant changes. Conclusions Imaging analysis could be a potential tool to detect changes in the pattern of patellar tendons. Some morpho-textural changes were found in male volleyball players: the textural contrast variable increases significantly throughout the annual season, meaning that the tendon becomes slightly flatter and loses circularity in its transverse section. The entropy and echogenic parameters obtained from the gray-scale histogram did not reveal any significant changes.

scholarly journals Mechanical properties of the patellar tendon in elite volleyball players with and without patellar tendinopathy

2013 ◽  
Vol 47 (13) ◽  
pp. 862-868 ◽  
Author(s):  
Christian Helland ◽  
Jens Bojsen-Møller ◽  
Truls Raastad ◽  
Olivier R Seynnes ◽  
Marie M Moltubakk ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Patellar Tendon ◽  
Patellar Tendinopathy ◽  
Volleyball Players

scholarly journals Patellar and Achilles Tendon Stiffness in Elite Soccer Players Assessed Using Myotonometric Measurements

2019 ◽  
Vol 11 (2) ◽  
pp. 157-162 ◽  
Author(s):  
Iver Cristi-Sánchez ◽  
Claudia Danes-Daetz ◽  
Alejandro Neira ◽  
Wilson Ferrada ◽  
Roberto Yáñez Díaz ◽  
...  
Keyword(s):  
Achilles Tendon ◽  
Patellar Tendon ◽  
Professional Training ◽  
Soccer Players ◽  
Patellar Tendinopathy ◽  
Control Group ◽  
Force Transmission ◽  
Level Of Evidence ◽  
Tendon Stiffness ◽  
Handheld Device

Background: Tendon overuse injuries are an issue in elite footballers (soccer players) and may affect tendon function. Achilles and patellar tendinopathy are the most frequent pathologies. Tendon stiffness, the relationship between the force applied to a tendon and the displacement exerted, may help represent tendon function. Stiffness is affected by training and pathology. Nevertheless, information regarding this mechanical property is lacking for elite soccer athletes. Hypothesis: Achilles and patellar tendon stiffness assessed using myotonometric measurements will be greater in elite soccer athletes than in control participants. Study Design: Cross-sectional study. Level of Evidence: Level 4. Methods: Forty-nine elite soccer athletes and 49 control participants were evaluated during the 2017 preseason. A handheld device was used to measure Achilles and patellar tendon stiffness. Dominant and nondominant limbs were assessed for both groups. Results: A significantly stiffer patellar tendon was found for both the dominant and the nondominant limb in the elite soccer athletes compared with the control group. Nevertheless, no differences were found in Achilles tendon stiffness between groups. When comparing between playing positions in soccer athletes, no significant differences were found for both tendons. Conclusion: Greater patellar tendon stiffness may be related to an improvement in force transmission during muscle contraction. On the other hand, it seems that after years of professional training, Achilles tendon stiffness does not change, conserving the storing-releasing function of elastic energy. The nonsignificant differences between positions may be attributable to the years of homogeneous training that the players underwent. Clinical Relevance: The present study shows another technique for measuring mechanical properties of tendons in soccer athletes that could be used in clinical settings. In the future, this technique may help clinicians choose the best exercise protocol to address impairments in tendon stiffness.

scholarly journals Ultrasound Characterization of Patellar Tendon in Non-Elite Sport Players with Painful Patellar Tendinopathy: Absolute Values or Relative Ratios? A Pilot Study

Diagnostics ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 882
Author(s):  
José L. Arias-Buría ◽  
César Fernández-de-las-Peñas ◽  
Jorge Rodríguez-Jiménez ◽  
Gustavo Plaza-Manzano ◽  
Joshua A. Cleland ◽  
...  
Keyword(s):  
Pilot Study ◽  
Patellar Tendon ◽  
Operating Characteristic ◽  
Diagnostic Value ◽  
Patellar Tendinopathy ◽  
Width Ratio ◽  
Elite Sport ◽  
Cross Sectional ◽  
Blinded Assessor

Imaging findings in patellar tendinopathy are questioned. The aim of this pilot study was to characterize ultrasound measures, by calculating ultrasound ratio and neovascularization of the patellar tendon in non-elite sport players with unilateral painful patellar tendinopathy. Cross-sectional area (CSA), width, and thickness of the patellar tendon were assessed bilaterally in 20 non-elite sport-players with unilateral painful patellar tendinopathy and 20 asymptomatic controls by a blinded assessor. Ultrasound ratios were calculated to discriminate between symptomatic and asymptomatic knees. The Ohberg score was used for characterizing neovascularization. We found that non-elite sport players with patellar tendinopathy exhibited bilateral increases in CSA, width, and thickness of the patellar tendon compared to asymptomatic controls (Cohen d > 2). The ability of ultrasound ratios to discriminate between painful and non-painful patellar tendons was excellent (receiver operating characteristic, ROC > 0.9). The best diagnostic value (sensitivity: 100% and specificity: 95%) was observed when a width ratio ≥ 1.29 between the symptomatic and asymptomatic patellar tendon was used as a cut-off. Further, neovascularization was also observed in 70% of non-elite sport players with unilateral patellar tendinopathy. A greater CSA ratio was associated with more related-disability and higher tendon neovascularization. This study reported that non-elite sport players with painful unilateral patellar tendinopathy showed structural ultrasound changes in the patellar tendon when compared with asymptomatic controls. Ultrasound ratios were able to discriminate between symptomatic and asymptomatic knees. Current results suggest that ultrasound ratios could be a useful imaging outcome for identifying changes in the patellar tendon in sport players with unilateral patellar tendinopathy.

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