<qa>  What is a common and impairing disorder?Chronic Achilles tendinopathy AT is a common and impairing disorder. High Volume Injection therapy HVI seems to show promising results in Achilles tendinopathy AT. HVI consist of a large volume of saline with a small amount of steroid. Steroid injections is widely used for treating tendinopathy but we know from the literature that steroid injections only gives a fast and short term pain reduction in tendinopathy where HVI seems to show both a short term and a more prolonged effect which could contribute the volume effect saline. 