Last December I had a rotator cuff repair. I decided that my rehab would consist of learning to swim laps all over again using the Total Immersion program. Ten week post op I swam a mile for the first time in my life (I'm 58.) About that time I saw a flyer for a local triathlon..."Hey, maybe I could do that!" Started running on the road and promptly got severe hamstring tendonitis. Despair. Everyone said give up running. Enter Jeff Galloway. Galloway has a run-walk system that he claims can keep you running injury-free well into "our" age group. Check it out at http://www.jeffgalloway.com/index.html