Exercise

So I've talked before about how I've been walking and building up to running.  I have been trying really hard to go slowly and gradually build up.  I walk for a good 5-10 min.  Then I stop and stretch.  Then I had gotten to where I was running 17 min then back and forth running/ walking until my 45 min. was up.  Well this past week my right hamstring has started hurting.  It's gradually gotten worse to where now it hurts even just walking regularly.  This is exactly what I was trying to avoid.  I want to be able to exercise for the rest of my life.  I wasn't just doing it to lose weight.  So I have decided to slow things way back down and add in some muscle strength training.  I'm going to walk in the mornings for 45 min. - no running- (at least for a few days).  And I am going to do some leg lifts, weights, crunches and various things at night.  Several people have told me how important it is to alternate cardio and muscle training, so I'm going to give it a try.  Hopefully my leg will heal and I can get back in to some running.  I was finally starting to enjoy it. =(