I'm also struck by cities that commute heavily by bike (such as Amsterdam). Your commute is your exercise. That is not how most Americans live, however.
I would absolutely love to commute by bike. Distance is a factor but that is not the primary issue. I am in south-east Georgia and bike lanes are an absolute foreign concept. I mean even if we had them, people would use them as passing lanes and all that.
I've seen plenty of 'sleep hack' articles recently; trying to do more with less where sleep is concerned. To me that is a complete non-starter. I truly just need more sleep.