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Shockwave therapy plus eccentric exercises versus isolated eccentric exercises for Achilles insertional tendinopathy: a double-blinded randomized clinical trial
Barbachan Mansur NS, Matsunaga FT, Carrazzone OL, Schiefer dos Santos B, Nunes CG, Aoyama BT, Dias dos Santos PR, Faloppa F, Sugawara Tamaoki MJ
Journal of Bone and Joint Surgery -- American Volume 2021 Jul 21;103(14):1295-1302
clinical trial
8/10 [Eligibility criteria: Yes; Random allocation: Yes; Concealed allocation: Yes; Baseline comparability: Yes; Blind subjects: Yes; Blind therapists: No; Blind assessors: No; Adequate follow-up: Yes; Intention-to-treat analysis: Yes; Between-group comparisons: Yes; Point estimates and variability: Yes. Note: Eligibility criteria item does not contribute to total score] *This score has been confirmed*

BACKGROUND: There remains a lack of consensus regarding the treatment of Achilles insertional tendinopathy. The condition is typically treated with eccentric exercises despite the absence of satisfactory and sustained results. Shockwave therapy was presented as an alternative, but there is a paucity of literature, with good outcomes, supporting its use. The purpose of the present single-center, double-blinded, placebo-controlled, randomized trial was to determine if the use of shockwave therapy in combination with eccentric exercises improves pain and function in patients with Achilles insertional tendinopathy. METHODS: A total of 119 patients with Achilles insertional tendinopathy were evaluated and enrolled in the study from February 2017 to February 2019. Patients were allocated to 1 of 2 treatment groups, eccentric exercises with extracorporeal shockwave therapy (SWT group) and eccentric exercises with sham shockwave therapy (control group). Three sessions of radial shockwaves (or sham treatment) were performed every 2 weeks and eccentric exercises were undertaken for 3 months. The primary outcome was the Victorian Institute of Sport Assessment-Achilles questionnaire (VISA-A) at 24 weeks. Secondary outcomes included the visual analogue scale, algometry, the Foot and Ankle Outcome Score, and the 12-Item Short Form Health Survey. RESULTS: Both groups showed significant improvement during the study period; however, there were no between-group differences in any of the outcomes (all p > 0.05). At the 24-week evaluation, the SWT group exhibited a mean VISA-A of 63.2 (95% confidence interval 8.0) compared with 62.3 (95% confidence interval 6.9) in the control group (p = 0.876). There was a higher rate of failure (38.3%) but a lower rate of recurrence (17.0%) in the SWT group compared with the control group (11.5% and 34.6%, respectively; p = 0.002 and p = 0.047). There were no complications reported for either group. CONCLUSIONS: Extracorporeal shockwave therapy does not potentiate the effects of eccentric strengthening in the management of Achilles insertional tendinopathy. LEVEL OF EVIDENCE: Therapeutic level I.

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