besides technique, more riding...
Doing stairs 2-3 steps at a time...slowly...like doing lunges but going up stairs and end the step by balancing on the ball of your foot and doing a calf rise. This gives the added bonus of developing your proprioceptive neuro-muscular system for balance.
Also, I just jump rope or you could do pylometric stuff.
I'm not a PT, but am old, fat and ride my bicycle along with the above and have very little problems with leg pain/burn...have noticed a huge difference in endurance, joint strength and able to shred all day since doing this for the past few years.
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