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Immersive virtual reality improves movement patterns in patients after ACL reconstruction: implications for enhanced criteria-based return-to-sport rehabilitation

Abstract

Purpose

The purpose of this study was to evaluate the influence of immersion in a virtual reality environment on knee biomechanics in patients after ACL reconstruction (ACLR). It was hypothesized that virtual reality techniques aimed to change attentional focus would influence altered knee flexion angle, knee extension moment and peak vertical ground reaction force (vGRF) in patients following ACLR.

Methods

Twenty athletes following ACLR and 20 healthy controls (CTRL) performed a step-down task in both a non-virtual reality environment and a virtual reality environment displaying a pedestrian traffic scene. A motion analysis system and force plates were used to measure kinematics and kinetics during a step-down task to analyse each single-leg landing.

Results

A significant main effect was found for environment for knee flexion excursion (P = n.s.). Significant interaction differences were found between environment and groups for vGRF (P = 0.004), knee moment (P < 0.001), knee angle at peak vGRF (P = 0.01) and knee flexion excursion (P = 0.03). There was larger effect of virtual reality environment on knee biomechanics in patients after ACLR compared with controls.

Conclusion

Patients after ACLR immersed in virtual reality environment demonstrated knee joint biomechanics that approximate those of CTRL. The results of this study indicate that a realistic virtual reality scenario may distract patients after ACLR from conscious motor control. Application of clinically available technology may aid in current rehabilitation programmes to target altered movement patterns after ACLR.

Level of evidence

Diagnostic study, Level III.

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Acknowledgments

The authors gratefully acknowledge the assistance of Adam Kiefer for editing the manuscript and providing critical comments.

Conflict of interest

The authors have no conflicts of interest that are directly relevant to the content of this article.

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Correspondence to Alli Gokeler.

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Gokeler, A., Bisschop, M., Myer, G.D. et al. Immersive virtual reality improves movement patterns in patients after ACL reconstruction: implications for enhanced criteria-based return-to-sport rehabilitation. Knee Surg Sports Traumatol Arthrosc 24, 2280–2286 (2016). https://doi.org/10.1007/s00167-014-3374-x

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  • DOI: https://doi.org/10.1007/s00167-014-3374-x

Keywords

  • Anterior cruciate ligament
  • Motor learning
  • External focus
  • Knee biomechanics