Guided and graded loading and a hell of a lot of patience. Exercise selection in the early phase. Not everyone can start at the exercise Hayden shows in the video above. We need to select an exercise and monitor symptoms. The best evidence tells us some pain is ok.
Once we feel the tendon and your symptoms are stable in comfort and symptoms we want to progress the intensity or load of the exercise without too much increase in symptoms. For example we would like to keep the pain at or below 4/10 with our first exercise. Once you have mastered it the pain should drop.
At that point in time when the pain drops we would normally increase the load again to continue along that 3-4/10 spectrum. Doing this for 8-12-16 weeks is the only way to get your tendon happy, healthy and strong again.