The Relationship Between Landing Sound, Vertical Ground Reaction Force, and Kinematics of the Lower Limb During Drop Landings in Healthy Men

Wernli, Kevin; Ng, Leo; Phan, Xuan Lan; Davey, Paul; Grisbrook, Tiffany L.

doi:10.2519/jospt.2016.6041

Cited by 28 publications

(23 citation statements)

References 22 publications

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“…Thirty-five reflective markers were placed on specific anatomical landmarks (left and right sides of the front of the head, left and right sides of the back of the head, 7th cervical vertebra, 10th thoracic vertebra, clavicle, sternum, right back, shoulders, lateral epicondyles of the elbows, medial wrists, lateral wrists, second metacarpal heads, anterior superior iliac spines, posterior superior iliac spines, lateral thighs, lateral epicondyles of the knees, lateral tibias, lateral malleolus, second metatarsal heads, and heels). Vicon’s Plug-in-Gait full body model (Vicon Motion Systems, Oxford, UK) was used to derive the lower extremity kinematic data [16]. Two force plates (MSA-6 Mini Amp, AMTI, MA, USA) were used to record vGRF during the landing phase of a single-leg drop vertical jump.…”

Section: Methodsmentioning

confidence: 99%

Dynamic knee valgus alignment influences impact attenuation in the lower extremity during the deceleration phase of a single-leg landing

et al. 2017

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Dynamic knee valgus during landings is associated with an increased risk of non-contact anterior cruciate ligament (ACL) injury. In addition, the impact on the body during landings must be attenuated in the lower extremity joints. The purpose of this study was to investigate landing biomechanics during landing with dynamic knee valgus by measuring the vertical ground reaction force (vGRF) and angular impulses in the lower extremity during a single-leg landing. The study included 34 female college students, who performed the single-leg drop vertical jump. Lower extremity kinetic and kinematic data were obtained from a 3D motion analysis system. Participants were divided into valgus (N = 19) and varus (N = 15) groups according to the knee angular displacement during landings. The vGRF and angular impulses of the hip, knee, and ankle were calculated by integrating the vGRF-time curve and each joint’s moment-time curve. vGRF impulses did not differ between two groups. Hip angular impulse in the valgus group was significantly smaller than that in the varus group (0.019 ± 0.033 vs. 0.067 ± 0.029 Nms/kgm, p<0.01), whereas knee angular impulse was significantly greater (0.093 ± 0.032 vs. 0.045 ± 0.040 Nms/kgm, p<0.01). There was no difference in ankle angular impulse between the groups. Our results indicate that dynamic knee valgus increases the impact the knee joint needs to attenuate during landing; conversely, the knee varus participants were able to absorb more of the landing impact with the hip joint.

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Section: Methodsmentioning

confidence: 99%

Dynamic knee valgus alignment influences impact attenuation in the lower extremity during the deceleration phase of a single-leg landing

et al. 2017

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“…Kinematic data were sampled at 240 Hz with a 16 Hz low-pass filter and a fourth-order zero lag Butterworth filter. Thirty-five reflective markers were placed on specific anatomical landmarks according to the Plug-in-Gait full body model, whisch is widely employed by researchers who use VICON23 ) . Two force plates (MSA-6 Mini Amp, AMTI, MA, USA) recorded ground reaction forces during landing, from each single-leg drop vertical jump, at a 1,200 Hz sampling rate.…”

Section: Methodsmentioning

confidence: 99%

Fatigue influences lower extremity angular velocities during a single-leg drop vertical jump

et al. 2017

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[Purpose] Fatigue alters lower extremity landing strategies and decreases the ability to attenuate impact during landing. The purpose of this study was to reveal the influence of fatigue on dynamic alignment and joint angular velocities in the lower extremities during a single leg landing. [Subjects and Methods] The 34 female college students were randomly assigned to either the fatigue or control group. The fatigue group performed single-leg drop vertical jumps before, and after, the fatigue protocol, which was performed using a bike ergometer. Lower extremity kinematic data were acquired using a three-dimensional motion analysis system. The ratio of each variable (%), for the pre-fatigue to post-fatigue protocols, were calculated to compare differences between each group. [Results] Peak hip and knee flexion angular velocities increased significantly in the fatigue group compared with the control group. Furthermore, hip flexion angular velocity increased significantly between each group at 40 milliseconds after initial ground contact. [Conclusion] Fatigue reduced the ability to attenuate impact by increasing angular velocities in the direction of hip and knee flexion during landings. These findings indicate a requirement to evaluate movement quality over time by measuring hip and knee flexion angular velocities in landings during fatigue conditions.

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“…Of the articles assessed for eligibility, 18 studies met all inclusion criteria for this systematic review. 18,27,[30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45]…”

Section: Search Strategymentioning

confidence: 99%

“…Of the 18 studies, 14 used 3-dimensional (3-D) motion-capture systems along with force plates to collect data on kinetic and kinematic variables. 18,27,31,33,[36][37][38][39][40][41][42][43][44][45] These systems can provide precise measurements of GRFs and joint kinematics, and they allow computation of joint kinetics that have been found to be valid and to provide good to excellent reliability for landing tasks. 46 Researchers in the remaining 4 studies used 2-dimensional (2-D) methods of motion analysis.…”

Section: Study Characteristicsmentioning

confidence: 99%

“…Many authors 27,[30][31][32][33][34][35]37,40,44,45 supplied information visually, such as figures of kinetic and kinematic feedback, videotaped recordings, visual demonstrations, and PowerPoint (Microsoft Corp, Redmond, WA) presentations. The jump-landing tasks included the drop vertical jump with double-legged landing, 27,30,33,[35][36][37][39][40][41] drop vertical jump with single-legged landing, 42 runningjump double-legged landing, 27,32,34,37,38,44,45 running-jump single-legged landing, 43 and countermovement double-legged landing jump. 18,31,37 The CT participants decreased sagittal-plane hip, knee, ankle joint range of motion; reduced ground contact time, and displayed a shorter reactive strength index than the EX and HT conditions.…”

Section: Study Characteristicsmentioning

confidence: 99%

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The Use of Augmented Information for Reducing Anterior Cruciate Ligament Injury Risk During Jump Landings: A Systematic Review

Armitano

Haegele

Russell

2018

Journal of Athletic Training

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Context: A comprehensive systematic review of the literature on the use of augmented information in anterior cruciate ligament (ACL) injury-prevention programs to improve jump-landing technique was conducted. The use of motor-learning concepts could provide more robust means of preventing ACL injuries. Objective: To systematically summarize the effectiveness of augmented information in improving the biomechanical factors associated with an increased risk for ACL injury. Data Sources: Articles were retrieved using the electronic databases of PubMed, MEDLINE, CINAHL, and Google Scholar and 3 lines of truncated search words: (a) lower extremity, knee, ACL, and anterior cruciate ligament; (b) prevention, injury prevention, and prehab; and (c) augmented information, augmented feedback, feedback, cue, and instruction. We also performed a hand search of the reference lists of the screened articles. Data Extraction: We independently assessed the methodologic quality using the Cochrane Group on Screening and Diagnostic Test Methods list. Articles were placed in 1 of 3 augmented-information categories: prescriptive, feedback, or transition. Articles were also categorized based on whether the information likely encouraged an internal or external focus of attention. Data Synthesis: The searches identified a total of 353 studies, of which 18 were included. Most researchers found that augmented information could lead to technique changes to reduce the biomechanical risk factors associated with ACL injury. The average methodologic quality of the studies was 11.8 out of 17, with a range from 8 to 15. The authors of only 7 studies examined retention of the improved techniques. Conclusions: The evidence suggests that augmented information can be used to significantly improve the biomechanical indicators associated with ACL injury and to enhance current ACL injury-prevention programs. Combined prescriptive and feedback information that encouraged both internal and external foci led to the largest retention effect sizes.

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The Relationship Between Landing Sound, Vertical Ground Reaction Force, and Kinematics of the Lower Limb During Drop Landings in Healthy Men

Cited by 28 publications

References 22 publications

Dynamic knee valgus alignment influences impact attenuation in the lower extremity during the deceleration phase of a single-leg landing

Dynamic knee valgus alignment influences impact attenuation in the lower extremity during the deceleration phase of a single-leg landing

Fatigue influences lower extremity angular velocities during a single-leg drop vertical jump

The Use of Augmented Information for Reducing Anterior Cruciate Ligament Injury Risk During Jump Landings: A Systematic Review

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