Objective: To assess the relationship between muscle-tendon function and symptoms in patients with Achilles tendinopathy using a validated test battery.
Design: A prospective non-randomised trial.
Setting: Orthopaedic Department, Sahlgrenska University Hospital, Sweden.
Patients: 37 patients with a clinical diagnosis of Achilles tendinopathy in the midportion of the tendon, with symptoms for >2 months, were evaluated at the initiation of the study and after 1 year.
Intervention: The patients were treated using a rehabilitation programme, under the supervision of a physical therapist, for 6 months.
Main outcome measurements: The patients were evaluated using the Swedish version of the Victorian Institute of Sports Assessment—Achilles questionnaire (VISA-A-S) for symptoms, and a test battery for evaluation of the lower leg muscle-tendon function.
Results: There were significant improvements in the VISA-A-S score (p<0.00, n = 37) and the test battery (p<0.02, n = 19) at the 1-year follow-up. The VISA-A-S questionnaire had an effect size of 2.1 and the test battery had an effect size of 0.73. A low correlation (r = 0.178, p>0.05) was found between the VISA-A-S score and the test battery. A high correlation (r = 0.611, p<0.05) was found between the drop counter movement jump and the VISA-A-S score. All other tests in the test battery had low correlations (r = −0.305 to 0.155, p>0.05) with the VISA-A-S score. Only 25% (4/16) of the patients who had full symptomatic recovery had achieved full recovery of muscle–tendon function as measured by the test battery.
Conclusion: Full symptomatic recovery in patients with Achilles tendinopathy does not ensure full recovery of muscle–tendon function. The VISA-A-S questionnaire and the test battery are sensitive to clinically relevant changes with treatment and can be recommended for use in both the clinic and research.
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Published Online First 26 January 2007
Competing interests: None.
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