One legged pedaling drills are so tricky, but they have been the key to helping my crummy right knee get SO much stronger. We call the jerky part the "clunk". I used to be only able to do 45 to 50 seconds per leg before I would fatigue and "clunk" . Once I clunked, I was to switch to the other leg. Now I'm up to 90 seconds before I "clunk"! Our coach says we will work up to 3 to 5 minutes at a time per leg - phew! Now that will be huge! Your pedal stroke technique will really benefit from this. But such mental concentration is needed. It is tough! Good luck! Tokie