Thanks for all the info. about your schedules! I run mainly because it's a stress reliever and it helps me with my insomnia. I enjoy the feeling I get after I run (sort of mellow and relaxed). I have a treadmill at home, so it's very convenient for me and requires no planning, etc. I also walk 1.5-3 miles/day with the dog rain or shine or snow, do yoga almost daily, and have started doing weights now that my rotator cuff injury is almost all better.
In terms of health benefits, this article in the NY Times from June was really informative to me. Essentially, researchers found that moderate running (1-20 miles/week at a pace of 10-11 minutes/mile) prolonged life by an average of 5-6 years. Investigators didn't look at how often per week, but instead focused on the overall mileage per week. So maybe, at least in terms of longevity and general health, whether one does it daily or every other day or whatever isn't as important. To reduce the risk of injury, I can see the merits of taking days off, for sure. And I like the idea of doing some interval running in a more planful way (right now I just sort of do that once in a while, whenever the mood strikes me).
Anyway, thanks for your thoughts! Here's the article, in case anyone is interested:
http://well.blogs.nytimes.com/.....-exercise/