Open AccessAltered movement during single leg hop test after ACL reconstruction: implications to incorporate 2‐D video movement analysis for hop tests
Author(s) -
Welling Wouter,
Benjaminse Anne,
Seil Romain,
Lemmink Koen,
Gokeler Alli
Publication year - 2018
Publication title -
knee surgery, sports traumatology, arthroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.806
H-Index - 125
eISSN - 1433-7347
pISSN - 0942-2056
DOI - 10.1007/s00167-018-4893-7
Subject(s) - anterior cruciate ligament reconstruction , knee flexion , medicine , anterior cruciate ligament , sagittal plane , range of motion , valgus , hop (telecommunications) , physical medicine and rehabilitation , return to sport , physical therapy , orthodontics , surgery , anatomy , computer science , rehabilitation , computer network
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.