Insertional Achilles tendinopathy is a disabling injury that is common in running athletes. Exercise therapy is considered the best treatment option, but there is still no agreement on the modalities. For example, it is thought that compression overload may be a major cause of tendinopathy and should therefore be restricted during rehabilitation. However, this recommendation is based on expert opinion and not on hard scientific evidence. Therefore, this randomised controlled trial (RCT) will investigate whether a therapy that limits the amount of compression of the tendon during a progressive tendon-loading rehabilitation protocol actually has better outcomes in athletes with insertional Achilles tendinopathy. Athletes with insertional Achilles tendinopathy will be randomised into two treatment groups; (1) an experimental rehabilitation protocol in which the amount of tendon compression is limited and (2) a control rehabilitation protocol in which the amount of tendon compression is not limited and is rather high. Both treatments consist of supervised progressive tendon-loading exercise therapy and patient education. In addition, the experimental group will also receive heel inserts to limit the amount of dorsiflexion during sports or daily activities. At baseline, at 12 weeks (end of intervention) and at 24 weeks (follow-up), pain, functionality, structure and intratendinous pressure will be determined.
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The change of the Victorian Institute of Sports Assessment-Achilles Questionnaire (VISA-A) score over 12 weeks
Timeframe: 12 weeks (at the end of intervention)
The change of the Victorian Institute of Sports Assessment-Achilles Questionnaire (VISA-A) score over 24 weeks
Timeframe: 24 weeks (at follow-up)