In reply to Mischap:
Hi Mishap
I've recently been diagnosed with both quadricep and patellar tendonitis in my left knee after a few months of pain that hasn't improved. I was struggling to walk up stairs and drive without pain and eventually went to a physio.
I've been told to rest it properly and reduce my activity to let the initial inflammation reduce ( I hadn't been very strict about this initially)
The physio has given me 3 exercises to do while I'm on less exercise, which you could try too
Leg raises 10 reps for 3 sets.
Bridges 10 reps for 3 sets
An exercise where you lie down, place a football under the knee, and try to push the football into the ground, hold for 5 seconds and then repeat 10 times for 3 sets.
The theory is this will gently stretch and strengthen the tendons, it's slow going, and frustrating not getting out and about but hopefully will be back to a pain free knee soon
Best of luck!