I have heard and read from various (low quality) sources that Tai Chi is effective to treat tendinitis (a.k.a. tendonitis). E.g.:
Gentle exercises such as Tai Chi, Yoga, and stretching, swimming and light weight lifting are all may help cure tendonitis.
About three years ago I was caught up in such a project and developed a problem with RSI (Repetitive Strain Injury, or Tendonitis) in my right arm. I have tried this experiment twice and am now satisfied that my daily Tai Chi is extremely important in keeping RSI at bay.
Is there any study on Tai Chi's effectiveness to treat tendinitis?