I have been doing 30 minutes on the treadmill every other day. Then I read that Hallie Berry does 4 hours on the treadmill when she isn't filming. I thought - well if that girl can do 4 hours then I can do at least 1 hour every other day. And I have been doing so. Crikey - I'm sore! I hope this soreness will last only a few weeks and then I can do 1 hour 6 days out of the week. I stretch lots before, during, after, and several other times during early morning and evening. Tell me I will survive! TIA!