First, I would try to find an ATC or PT who had their CSCS (Strength & COnditioning Certification), for advice on techniques, exercises, etc.
Next, like anything (golf, for example) - the more you do it, the better you should get at it. So, simply sprint a lot! Also, train your "power" muscles or fast-twitch muscles with jumping, bounding, hills (up and downhill), any 'explosive' movements. Good strength training is always important. It is absolutely essential to become more flexible - i.e., lots of stretching.
Ask someone you trust like coach, trainer, etc. and make sure you are cleared by an MD. GOOD LUCK!