Altered movement during single leg hop test after ACL reconstruction: implications to incorporate 2-D video movement analysis for hop tests

Wouter Welling*, Anne Benjaminse, Romain Seil, Koen Lemmink, Alli Gokeler

*Corresponding author for this work

    Research output: Contribution to journalArticleResearchpeer-review

    26 Citations (Scopus)

    Abstract

    Purpose: There is a lack of objective factors which can be used in guiding the return to sport (RTS) decision after an anterior cruciate ligament reconstruction (ACLR). The purpose of the current study was to conduct qualitative analysis of the single leg hop (SLH) in patients after ACLR with a simple and clinical friendly method and to compare the possible difference in movement pattern between male and female patients. Methods: Sixty-five patients performed the single leg hop (SLH) test at 6.8 ± 1.0 months following isolated ACLR. Digital video camcorders recorded frontal and sagittal plane views of the patient performing the SLH. Knee flexion at initial contact (IC), peak knee flexion, knee flexion range of motion (RoM), and knee valgus RoM were calculated. In addition, limb symmetry index (LSI) scores were calculated. Results: No differences were found in movement pattern between males and females. Movement analysis revealed that males had a decrease in knee flexion at IC (p = 0.018), peak knee flexion (p = 0.002), and knee flexion RoM (p = 0.017) in the injured leg compared to the non-injured leg. Females demonstrated a decrease in peak knee flexion (p = 0.011) and knee flexion RoM (p = 0.023) in the injured leg compared to the non-injured leg. Average LSI scores were 92.4% for males and 94.5% for females. Conclusions: Although LSI scores were > 90%, clinical relevant altered movement patterns were detected in the injured leg compared to the non-injured leg. Caution is warranted to solely rely on LSI scores to determine RTS readiness. Clinical trial registry name and registration: The University of Groningen, ID 2012.362. Level of evidence: III.

    Original languageEnglish
    Pages (from-to)3012-3019
    Number of pages8
    JournalKnee Surgery, Sports Traumatology, Arthroscopy
    Volume26
    Issue number10
    DOIs
    Publication statusPublished - 1 Oct 2018

    Keywords

    • Anterior cruciate ligament
    • Hop tests
    • Jump landing
    • Movement analysis
    • Return to sport

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