Hip arthroscopy improved squat performance in patients with femoroacetabular impingement
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Patients with femoroacetabular impingement syndrome had improved squat performance and sagittal plane range of motion after hip arthroscopy, according to results presented at the Orthopaedic Research Society Annual Meeting.
Philip Malloy, PT, PhD, and colleagues conducted 3D motion analysis testing on 13 patients with femoroacetabular impingement (FAI) syndrome prior to hip arthroscopy and at an average of 9.5 months postoperatively, as well as at a single time point on 18 healthy controls. All participants completed three single-leg squat trials, according to researchers. Researchers calculated squat depth and hip joint angles and collected kinematic and kinetic data.
“The variables of interest for our study were squat depth in millimeters, and that was based on the center of mass position, ... and then dynamic range of motion in degrees for the hip joint in all planes and the pelvis segment in reference to the global coordinate system in all planes,” Malloy said in his presentation.
Malloy noted patients with FAI syndrome had a significant reduction in alpha angle. However, results showed no changes in lateral center edge or Tönnis angles.
“There were significant improvements in patient-reported outcomes for all of these hip-specific patient-reported outcome scores,” Malloy said. “Patients also demonstrated a significant reduction in pain on a visual analog scale.”
Patients with FAI syndrome had improved single-leg squat performance with improved squat depth postoperatively, as well as improved sagittal plane range of motion of the hip, according to Malloy. He added the control group had no differences in single-leg squat performance or sagittal plane range of motion.
“However, there were still alterations in movement and dynamic movement in the frontal or coronal plane following surgeries where there was a difference in postoperative controls,” Malloy said. “Although there was no difference between [femoroacetabular impingement] preoperative and postoperative patients, the change after surgery does now create a difference in the control subjects.”
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Malloy P, et al. Paper 76. Presented at: Orthopaedic Research Society Annual Meeting; Feb. 12-16, 2021 (virtual meeting).
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