Hi, Leigh. Thanks for all the great information. I have a question about rest days. I'm initiating some major lifestyle changes, which include diet and exercise. My short-term goal is to run a 5k on October 13 while my long-term goal is to either get down to 120 or a size 6 and of course maintain that weight. I also have decided to become an athlete now that I'm 30. Anyway, I've made quite a bit of progress with my jogging in the last couple of weeks and I don't really take "rest days." At this point I'm jogging/running 4 days per week and jogging/walking combo 2 days per week and walking briskly one day per week. Can I count that brisk walk day as my rest day? Or should I truly be resting? Or can I swim or ride my bike that day?