It's a good idea, but I wouldn't count on fatties to keep up the routine. I tried encouraging my overweight flatmate and friend (we became friends as kids when we were both a normal size. I try not to associate with hams now) to come run with my every morning. All she had was excuses: "I don't feel well when I workout in the morning. My stomach hurts. It's too early. I need my sleep. etc." If she ever does workout, the first thing she thinks about is treating herself ("let's get a fruit smoothie!"- full of sugar and fat ugh).  I'm literally out of bed, done with my workout, showered, done with breakfast, and working on homework by the time she even wakes up in the morning. And all of my classes start after hers. Sorry about the rant. I had to get this out after just a week of living with her again. Plus, she used the genetic excuse the other night, and I've been a bit pissed off about it.