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Randomized Controlled Trial
. 2019 Jul;29(4):267-275.
doi: 10.1097/JSM.0000000000000516.

A Prospective, Randomized, Controlled Trial Comparing Conservative Treatment With Trunk Stabilization Exercise to Standard Hip Muscle Exercise for Treating Femoroacetabular Impingement: A Pilot Study

Michihisa Aoyama  1 , Yasuo Ohnishi  2 , Hajime Utsunomiya  2 , Shiho Kanezaki  2 , Hiroki Takeuchi  1 , Makoto Watanuki  1 , Dean K Matsuda  3 , Soshi Uchida  2
Affiliations
Randomized Controlled Trial

A Prospective, Randomized, Controlled Trial Comparing Conservative Treatment With Trunk Stabilization Exercise to Standard Hip Muscle Exercise for Treating Femoroacetabular Impingement: A Pilot Study

Michihisa Aoyama et al. Clin J Sport Med. 2019 Jul.

Abstract

Objective: To assess the efficacy of conservative management of women with femoroacetabular impingement (FAI) using trunk stabilization.

Design: Randomized controlled trial (level of evidence: I).

Subjects: Twenty FAI female patients who met the inclusion FAI criteria.

Methods: A prospective, randomized, controlled study was performed on 20 female patients with symptomatic FAI comprising 2 groups (10 hips in trunk stabilization exercise group vs 10 hips in control group). We evaluated hip range of motion, isometric muscle strength using a handheld dynamometer (μ-TasMF-01; Anima, Co), and patient-reported outcome measures, including modified Harris hip score, Vail hip score, and international hip outcome tool 12 (iHOT12) before and at 4 weeks and 8 weeks after the intervention.

Results: There was a significant improvement in the range of motion of hip flexion in the trunk training group detected as early as 4 weeks after the intervention compared with the control group (P < 0.05). Hip abductor strength significantly improved in the trunk training group at 4 weeks after the intervention, whereas it did not improve in the control group (P < 0.05). Vail hip score and iHOT12 were significantly increased at 8 weeks after the intervention in the trunk training group compared with the control group (iHOT12: 78.7 ± 22.4 vs 53.0 ± 22.3; P < 0.01, Vail hip score: 81.6 ± 18.5 vs 61.1 ± 11.6; P < 0.05). There was no significant difference in the modified Harris hip score between both the groups at 4 and 8 weeks after the intervention.

Conclusions: The addition of trunk stabilization exercise to a typical hip rehabilitation protocol improves short-term clinical outcomes and may augment nonoperative and postoperative rehabilitation.

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Conflict of interest statement

S. Uchida is a consultant for Smith & Nephew and Zimmer-Biomet and receives research funds from Smith & Nephew and Stryker. D. K. Matsuda is a consultant for Zimmer-Biomet. The remaining authors report no conflicts of interest.

Figures

Figure 1.
Figure 1.
Participant flowchart.
Figure 2.
Figure 2.
Trunk stabilization training. A, Plank. B, Bird dog.
Figure 3.
Figure 3.
Patient-reported outcome score iHOT12 at preintervention and 4 weeks and 8 weeks after the intervention. Error bur: standard deviation. Two-way analysis of variance and Bonferroni post hoc test, *P < 0.05, **P < 0.01.
Figure 4.
Figure 4.
Patient-reported outcome score Vail hip score at preintervention and 4 weeks and 8 weeks after the intervention Error bur: standard deviation. Two-way analysis of variance and Bonferroni post hoc test, *P < 0.05, **P < 0.01.
Figure 5.
Figure 5.
Patient-reported outcome score modified Harris hip score at preintervention and 4 weeks and 8 weeks after the intervention. Error bur: standard deviation. Two-way analysis of variance and Bonferroni post hoc test, **P < 0.01.
See this image and copyright information in PMC

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