Limb Asymmetries in Landing and Jumping 2 Years Following Anterior Cruciate Ligament Reconstruction

Paterno, Mark V.; Ford, Kevin R.; Myer, Gregory D.; Heyl, Rachel; Hewett, Timothy E.

doi:10.1097/jsm.0b013e31804c77ea

Cited by 346 publications

(371 citation statements)

References 29 publications

(40 reference statements)

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“…[8][9][10] Considerably less research has investigated bilateral force production asymmetry and the majority examined previously injured populations. [11][12] Yoshioka et al 20 assessed bilateral strength asymmetry in a computer simulation model, and their results indicated that jump height was not affected by strength asymmetry and that the stronger leg possibly compensated for the weaker leg. If this was assessed on human subjects, the compensation of the stronger side may not be adequate to make up for the weaker side and the results may be different.…”

Section: Introductionmentioning

confidence: 99%

Isometric force production symmetry and jumping performance in collegiate athletes

Bailey¹,

Sato²,

Alexander³

et al. 2013

Journal of Trainology

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Objectives:The purpose of this study was to identify the relationship between isometric force production symmetry and jumping performance in weighted and un-weighted static and countermovement jumps (SJ and CMJ). Design: Bivariate correlation between isometric force production symmetry and vertical jump performance variables. Methods: Collegiate athletes were evaluated for this study (n=36). Subjects performed SJ, CMJ, and isometric mid-thigh pulls (IMTP). Jumps were analyzed for jump height (JH) and peak power (PP). IMTP was analyzed for peak force (PF) for left and right sides, and values were calculated to produce a peak force symmetry index (PF-SI) score. Correlational statistics were performed examining the relationship between PF-SI and jump variables.

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Section: Introductionmentioning

confidence: 99%

Isometric force production symmetry and jumping performance in collegiate athletes

Bailey¹,

Sato²,

Alexander³

et al. 2013

Journal of Trainology

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“…1,7,19 Another consequence of the 2011 NFL Lockout may be an increase in relative reinjury risk during early sports reintegration, due to greater residual biomechanical and neuromuscular deficits from prior injuries or surgeries sustained in previous years. 3,8,18,20 The "release for full activity" is a potentially sensitive landmark for the athlete who has a strong desire to return to immediate high-level sports participation. 12 During standard NFL preseason rehabilitation, the sports medicine team and strength and conditioning staff work together with the athlete to bridge the potential gap between the athletes' perceived versus actual sports readiness.…”

mentioning

confidence: 99%

Did the NFL Lockout Expose the Achilles Heel of Competitive Sports?

Myer¹,

Faigenbaum²,

Cherny³

et al. 2011

J Orthop Sports Phys Ther

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“…Symmetry is assumed in bilateral VJ landings and therefore seldom assessed or reported in the literature except when related to injury [32]. In order to determine the typical levels of symmetry in a bilateral landing, where the two limbs should theoretically contribute equally, considering the bilateral nature of the movement, we used ND participants to indicate asymmetry tolerance levels.…”

Section: Discussionmentioning

confidence: 99%

Asymmetrical loading demands associated with vertical jump landings in people with unilateral transtibial amputation

2013

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Abstract-Loading symmetry during vertical jump landings between a person with amputation's intact and prosthetic limbs was assessed to determine the role of each limb in controlling the downward momentum of the center of mass during landing. Six participants with unilateral transtibial amputation (TTA) and ten nondisabled participants completed 10 maximal vertical jumps, of which the highest jump was analyzed. Contralateral symmetry was assessed through the Symmetry Index (SI), while symmetry at the group level was assessed through a Mann-Whitney U test. Participants with TTA performed quasiunilateral landings onto the intact limbs, resulting from either the incapability of the prosthetic ankle to plantar flex or increased residual-limb knee and hip flexion. In the loading phase, the participants with TTA displayed reduced prostheticside peak vertical forces (p = 0.04) along with reduced prosthetic-side ankle range of motion (p < 0.001), extensor moments (p = 0.03), and negative work generated (p = 0.00). Individual asymmetries were evident in the peak vertical force magnitudes (SI = 51%-140%), duration from touchdown to peak vertical force (SI = 52%-157%), ankle joint angles at touchdown (SI = 100%-538%), ranges of motion (SI = 147%-200%), knee (SI = 66%-179%) and hip (SI = 87%-132%) extensor moments, and work done at the ankle (SI = 155%-199%) and hip (SI = 83%-204%

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Limb Asymmetries in Landing and Jumping 2 Years Following Anterior Cruciate Ligament Reconstruction

Abstract: Female athletes who have undergone ACLR and returned to sport may continue to demonstrate biomechanical limb asymmetries 2 years or more after reconstruction that can be identified during landing.

Cited by 346 publications

References 29 publications

Isometric force production symmetry and jumping performance in collegiate athletes

Isometric force production symmetry and jumping performance in collegiate athletes

Did the NFL Lockout Expose the Achilles Heel of Competitive Sports?

Asymmetrical loading demands associated with vertical jump landings in people with unilateral transtibial amputation

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