Just bought the Flex-N-Go and I’m trying your exercises. I’ve been down all the avenues you have with my patellar tendonitis; physical therapy, hot and cold packs, massage, and PRP (which cost me a ton!). The success rate of surgery is low so I opted out of that. Thanks for posting this information. I have high hopes for these exercises and will let you know how it goes. Also, check out the Rumble Roller. I discovered it on this website http://-knee-/injuries/patellar-tendonitis-knee-tendonitis/ along with some great exercises for strengthening your legs.