It's some of the effect, but absolutely not all. You said it's pure selection bias, no more, no less... That was your point. I'm the same person, but the last

It's some of the effect, but absolutely not all. You said it's pure selection bias, no more, no less... That was your point. I'm the same person, but the last place I lived I averaged 7k steps and now I average 4k steps. That clearly affects my level of health and weight.