Effects of Altering Trunk Position during Landings on Patellar Tendon Force and Pain

Silva, Rodrigo Scattone; Purdam, Craig; Fearon, Angela; Spratford, Wayne; Kenneally-Dabrowski, Claire; Preston, Peter; Serrão, Fábio Viadanna; Gaida, James Edmund

doi:10.1249/mss.0000000000001369

Cited by 28 publications

(66 citation statements)

References 55 publications

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“…Participants in this study displayed a similar knee flexion angle at IC and a hip extension strategy during landing contrary to the hypothesis. Lack of difference in knee flexion angle at IC between PT and controls aligns with previous research in adult PT cohorts during drop landings and a spike jump landing . However, this study's finding contradicts a significantly greater knee flexion angle at IC reported in asymptomatic PTA cohorts, adults and sub‐elite junior basketballers during the horizontal phase of a stop‐jump.…”

Section: Discussionsupporting

confidence: 73%

“…The disparity of kinematic findings in this study in comparison with other landing studies may partially be explained by varied cohorts (age, sport, skill level, injury history/current) and jump‐landing task selection (stop‐jump horizontal landing, spike jump landing, drop landing). Most of the previous research investigating PT and landing kinematics has focused upon a vertical landing phase; however, in comparison athletes adopt a different movement strategy in a horizontal landing phase . The differences of kinematic findings between studies and differences in landing strategies between vertical and horizontal tasks supports the idea of contextually specific landing mechanics.…”

Section: Discussionmentioning

confidence: 96%

“…The remaining 23 participants were stratified based on the following criteria: (a) typical bilateral patellar tendons (n = 11, termed controls); (b) current symptomatic PT (VISA‐P score <80 with hypoechoic regions present bilaterally or unilaterally (n = 8); and (c) current asymptomatic PTA (VISA‐P score ≥80) with hypoechoic regions present bilaterally or unilaterally (n = 4). Due to the sample size of the asymptomatic PTA group, they were excluded from the statistical analysis nor was the group included in the control group as they have previously been reported to adopt different stop‐jump mechanics to the control group, and this would therefore likely confound results.…”

Section: Methodsmentioning

confidence: 99%

“…Landing mechanics during dynamic tasks may also be a critical factor associated with PT . Altered lower limb mechanics during landing have previously been reported to be associated with symptomatic PT, and/or asymptomatic PTA across various jump‐landing tasks, ages, sporting cohorts, and sporting levels . These cross‐sectional studies reveal how jump‐landing mechanics may be altered with injury, yet the disparate findings between studies suggest key significant variables may only be implicated with injury under certain circumstances.…”

Section: Introductionmentioning

confidence: 91%

“…For example during a horizontal stop‐jump landing, male adult participants from team sports with repetitive landings who were asymptomatic with a PTA have been shown to contact the ground with greater knee flexion at IC in a horizontal stop‐jump landing . However, the same study reported knee flexion angle was not significant in the vertical stop‐jump landing nor was it reported to be significant for asymptomatic elite male adult basketballers with PTA in a drop land …”

Section: Introductionmentioning

confidence: 99%

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Jump‐landing mechanics in patellar tendinopathy in elite youth basketballers

Harris

Schultz

Drew

et al. 2020

Scandinavian Med Sci Sports

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Patellar tendinopathy (PT) is a leading cause of morbidity in jump‐landing athletes. Landing mechanics are identified as a factor associated with PT and/or patellar tendon abnormality. This study aimed to identify key jump‐landing variables associated with PT. Thirty‐six junior elite basketball players (men n = 18, women n = 18) were recruited from a Basketball Australia development camp. Three‐dimensional (3D) kinematic and ground reaction force (GRF) data during a stop‐jump task were collected as well as ultrasound scans of the patellar tendons and recall history of training load data. Mixed‐model factorial analyses of variance were used to determine any significant between‐group differences. Of the 23 participants included for statistical analyses, 11 had normal bilateral patellar tendons (controls) and eight reported PT (currently symptomatic); however, the four participants categorized as asymptomatic with patellar tendon abnormality on diagnostic imaging were excluded from statistical analyses due to their small sample size. Athletes with PT displayed a similar knee flexion angle at initial foot‐ground contact (IC) and hip extension strategy during a stop‐jump horizontal landing. Despite a similar kinematic technique, athletes with PT utilized a strategy of a longer stance duration phase from IC to peak force. This strategy did not lead to those athletes with PT decreasing their peak vertical GRF nor patellar tendon force during landing but enabled these athletes to land with a lower rate of loading (control 59.2 ± 39.3 vs. PT 29.4 ± 33.7 BW.s‐1). Athletes with PT still reported significantly reduced training volume (control 4.9 ± 1.8 vs PT 1.8 ± 1.1 sessions/wk; total training time/wk control 2.4 ± 1.0 vs PT 1.4 ± 1.1 h/wk).

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Section: Discussionsupporting

confidence: 73%

Section: Discussionmentioning

confidence: 96%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Jump‐landing mechanics in patellar tendinopathy in elite youth basketballers

Harris

Schultz

Drew

et al. 2020

Scandinavian Med Sci Sports

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Promoting effective tendon healing and remodeling

Andarawis‐Puri

Flatow

2018

Journal Orthopaedic Research

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Daily activities subject our tendons to accumulation of sub-rupture fatigue injury which can lead to tendon rupture. Consequently, tendinopathies account for over 30% of musculoskeletal consultations. We adopted a multidisciplinary approach to determine the role of the extracellular matrix (ECM) in the pathogenesis of tendinopathy and impaired healing of ruptured tendons. We have been investigating three main areas: (i) the pathogenesis of tendon degeneration; (ii) approaches to promoting remodeling of sub-rupture fatigue injuries; and the (iii) role of the ECM in promoting scarless tendon healing. In this Kappa Delta Young Investigator award paper, we describe the key discoveries made in each of our three research areas of focus. Briefly, we discovered that sub-rupture fatigue damage can accumulate from just one bout of fatigue loading. Furthermore, any attempt to repair the fatigue damage diminishes as the severity of induced damage increases. We have utilized exercise to develop animal models of exercise-led degeneration and exercise-led repair of sub-rupture fatigue damage injuries, wherein underlying mechanisms can be uncovered, thereby overcoming a major hurdle to development of therapeutics. Since damage accumulation ultimately leads to rupture that is characterized by formation of a mechanically inferior scar, we have used the MRL/MpJ mouse to evaluate the role of the systemic environment and the local tendon environment in driving regeneration to identify new therapeutic pathways to promote scarless healing. Our data suggests that the therapeutic potential of the MRL/MpJ provisional ECM should be further explored as it may harness biological and structural mechanisms to promote scarless healing. © 2018 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res.

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Patellar Tendon Tendinopathy

Charalambous

2021

The Knee Made Easy

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Effects of Altering Trunk Position during Landings on Patellar Tendon Force and Pain

Cited by 28 publications

References 55 publications

Jump‐landing mechanics in patellar tendinopathy in elite youth basketballers

Jump‐landing mechanics in patellar tendinopathy in elite youth basketballers

Promoting effective tendon healing and remodeling

Patellar Tendon Tendinopathy

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