I wonder how long it takes to recover from a biopsy of a tendon.
E.g. Zheng, Ming Hao, Paul Anderson, and Jerome Waddell. Orthocell's Ortho-ATI: Tendon Regeneration. Vol. 1. Jerome Waddell, 2014., propose to treat tendinopathies by extracting tendon samples from the patient via minimally invasive biopsy, growing tenocytes, and reinjecting them back to the injured tendon.