I live in Guadalajara where I'd be hard-pressed to find a jogging route free of diesel fumes. But I find it sheepish to invoke it in these discussions because I

I live in Guadalajara where I'd be hard-pressed to find a jogging route free of diesel fumes. But I find it sheepish to invoke it in these discussions because I know why I have a treadmill and don't need to defend it. While I think OP is misdirected, I knew all sorts of people when I lived in the suburbs who had exercise equipment they bought for the idea yet it was left unused year round. And the idea of taking a walk outside through the clear air of suburban Texas seemed lost on most of my neighbors who, of those I knew personally, did not have the excuses we like to make up for them in these threads. Though I'm not so sure guilting them in these threads is the most effective way to change behavior -- we probably both agree there.