On a leg press, he can do 30 reps at 55 pounds (about 30% of body weight) using both legs without developing subsequent tendon pain. Plan is to build quad strength below the pain threshold and eventually move into an eccentric program.

Most eccentric protocols I have seen call for single leg squats on a 25% - 30% decline board - so quite a ways to go for that.

3rd ACP injection is scheduled about 2 weeks out - so perhaps will build up to decline board squats over 6 months or longer.

Any thoughts on:
1) Continuing ACP injections if providing some benefit (will have had 3 spaced 2 weeks apart).
2) Effectiveness of eccentrics at less than optimal loading (i.e. 2 legged at 50% of body weight?).

Thanks for any thoughts.