How does therapy help gluteus medius tendinosis?

Muscle remodeling. There are 3 phases of healing for injuries: inflammation, proliferation, and remodeling. Tendonosis occurs when this process gets stuck before the remodeling phase. The appropriate exercises can help this process move forward and correct any factors that might have led to it in the first place. Eccentric exercises have scientifically proven to help tendonosis at several locations in the body.
Strength & Mobility. In general physical therapy helps with optimizing mobility, range of motion and strength to help speed recovery and reduce risks of re-injuring tissue that is prone to chronic problems after an initial injury. For pain at the site of the gluteus medius, it is important to have an accurate diagnosis as injuries in other areas such as the lumbar spine and hip joint can also refer pain to the area.