Do you exercise at least 30 minutes a day? Good. But you might be undoing a lot of the benefits if you sit motionless while using your laptop or watching TV the rest of the day. It’s called being an active couch potato. That’s the bad news. But don’t sit and stew about it. The good news is that just a little movement can make a big difference. (I’m twiddling my thumbs right now.) WaPo (Gift Article): How sitting all day can cause health problems — even if you exercise.