Acute and Subacute Changes in Dynamic Postural Control After Hip Arthroscopy and Postoperative Rehabilitation

Context: Hip pain is associated with impairments in postural control and balance. The Star Excursion Balance Test (SEBT) is a reliable and valid method for measuring dynamic postural control. Objective: To examine changes in dynamic postural control after hip arthroscopy and subsequent rehabilitation from baseline to 3 and 6 months postsurgery. Design: Case series. Setting: Physiotherapy department. Patients or Other Participants: Sixty-seven individuals (47 men, 20 women; age = 31 +/- 8 years, height = 1.78 +/- 0.09 m, mass = 83 +/- 15 kg) scheduled for hip arthroscopy to address chondrolabral conditions were matched with 67 healthy individuals serving as controls (47 men, 20 women; age = 31 +/- 8 years, height = 1.77 +/- 0.09 m, mass = 80 +/- 16 kg). The hip arthroscopy group underwent postoperative rehabilitation including SEBT training. Main Outcome Measure(s): The SEBT reach normalized to limb length was collected before surgery (baseline) and at 3 and 6 months after arthroscopy and compared with that of the healthy matched control group. Repeated-measures analysis of variance was used to evaluate whether SEBT reach differed among the 3 time points, and t tests were used to evaluate between-limbs and between-groups differences. Results: The SEBT reach in the hip arthroscopy group at baseline was less than that of the control group in all directions (P values < .001). At 3 months after arthroscopy, SEBT reach increased in the posteromedial (PM; P = .007), posterolateral (PL; P < .001), and anterolateral (AL; P < .001) directions from baseline. At 6 months after arthroscopy, all directions of reach had increased (P values < .001) from baseline. The anteromedial (mean difference [MD] =-2.9%, P = .02), PM (MD =-5.2%, P = .002), and AL (MD =-2.5%, P = .04) reach distances remained shorter at 6 months after surgery in the hip arthroscopy group than in the control group. No difference existed between the control and hip arthroscopy groups for reach in the PL direction (MD =-3.6%; P = .06). Conclusions: Dynamic balance control in the hip arthroscopy group at baseline was poorer than in a matched control group as measured using the SEBT. At 3 months after hip arthroscopy, we observed improvements in dynamic balance in the PM, PL, and AL SEBT directions. By 6 months after arthroscopy, all directions of SEBT reach had improved, but only the PL reach improved to the level of healthy control individuals.