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Dissertation 2013 Nyman.pdf (6.25 MB)

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The Effects of an OpenNI / Kinect-Based Biofeedback Intervention on Kinematics at the Knee During Drop Vertical Jump Landings: Implications for Reducing Neuromuscular Predisposition to Non-Contact ACL Injury Risk in the Young Female Athlete

Nyman, Edward, Jr.
http://rave.ohiolink.edu/etdc/view?acc_num=toledo1381269608

Abstract Details

2013, Doctor of Philosophy, University of Toledo, Exercise Science.
Introduction: The purpose of this study was to design and evaluate the validity and effectiveness of a prototype real-time Kinect-based biofeedback and screening system (KBBFSS) during drop vertical jump (DVJ) ACL injury prevention training in young female athletes. We hypothesized that KBBFSS would be both valid and reliable as compared with traditional MOCAP, and that a four-week intervention using KBBFSS would be effective at improving landing kinematics. Methodology: 24 female gymnasts were randomized into control (CTRL) or Kinect-based biofeedback (KBF) groups. Eight of the subjects were additionally randomized into a validation subset. Subjects were grouped as high risk or normal risk using a novel risk stratification algorithm. Custom KBBFSS software afforded on-screen representation of limb and joint segments responding intuitively and immediately to subject movement. Subjects performed twenty 30cm drop landings three days per week for four weeks, wherein KBF subjects used the KBBFSS to augment landing mechanics, while CTRL subjects did so without KBBFSS. Alpha-level was set a priori at p≤0.05. Results: KBBFSS results were valid for pre (r=0.963) and post (r=0.897) knee flexion, and pre (r=0.815) and post (r=0.916) knee separation distance as compared with MOCAP. Knee flexion change score was statistically different between groups (p=0.001) and effect size was large (d= 1.618), power of 0.93. Knee separation distance change score was statistically different (p=0.024) between groups, with moderate effect size (d=0.99) and power of 0.73. KBF group reduced peak vGRF more than controls, with large effect size (d=1.84). KBF decreased peak bilateral frontal plane valgus knee moment more than controls, with moderate effect size (d=0.44). Correlations between pre-training RQS and changes in knee flexion and separation distance for high risk subjects were moderate. Conclusion: KBBFSS kinematic values are valid and KBF intervention significantly improved non-contact ACL injury risk knee kinematics. The RQS algorithm moderately predicted outcome measures, supporting previously established postulations that individuals who are at greatest functional risk of non-contact ACL injury stand to gain the greatest benefit from intervention. Though further research is warranted, in particular longitudinally, this new clinically-deployable tool may be effective in combating non-contact ACL injury in female adolescent athletes.
Barry Scheuermann, PhD (Committee Chair)
Charles Armstrong, PhD (Committee Member)
Martin Rice, PhD (Committee Member)
Vijay Goel, PhD (Committee Member)
144 p.
Biomechanics; Computer Science; Health Sciences; Kinesiology; Rehabilitation; Sports Medicine
ACL; Kinect; OpenNI; Biofeedback; Knee Injury; Gymnastics; Female Athlete; Injury Prevention; Biomechanics

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Citations

  • Nyman, Jr., E. (2013). The Effects of an OpenNI / Kinect-Based Biofeedback Intervention on Kinematics at the Knee During Drop Vertical Jump Landings: Implications for Reducing Neuromuscular Predisposition to Non-Contact ACL Injury Risk in the Young Female Athlete [Doctoral dissertation, University of Toledo]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1381269608

    APA Style (7th edition)

  • Nyman, Jr., Edward. The Effects of an OpenNI / Kinect-Based Biofeedback Intervention on Kinematics at the Knee During Drop Vertical Jump Landings: Implications for Reducing Neuromuscular Predisposition to Non-Contact ACL Injury Risk in the Young Female Athlete. 2013. University of Toledo, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=toledo1381269608.

    MLA Style (8th edition)

  • Nyman, Jr., Edward. "The Effects of an OpenNI / Kinect-Based Biofeedback Intervention on Kinematics at the Knee During Drop Vertical Jump Landings: Implications for Reducing Neuromuscular Predisposition to Non-Contact ACL Injury Risk in the Young Female Athlete." Doctoral dissertation, University of Toledo, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1381269608

    Chicago Manual of Style (17th edition)

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© 2013, all rights reserved.
This open access ETD is published by University of Toledo and OhioLINK.