I wonder if laziness causes lack of exercise, or if lack of exercise causes laziness? Probably both.

The really sad thing is that as you get out of shape and overweight, the more you are too embarrassed (or too tired) to get out of your car, or better yet, ditch the car and walk/bike/run.
Sometimes these folk actually give up, telling themselves it's too late to ever change.

It's never too late!