I am considering this question specifically:
Why does walking/jogging seem to do so much more for you than only bicycling?
When a question get into the mechanics of physical exercise choices or perhaps something like the merits of one exercise over another, I think we're starting to get away from the expertise of "health-related questions" and swerving into something that might be a better fit for our Physical Fitness site.
Certainly questions about how exercise affects health are on topic; and yes, we do allow some overlap of scope — but I'm not sure the specific expertise/focus of this site is best equipped to answer questions about exercise routines specifically.
I probably would have directed this users to ask their question on the Physical Fitness site… but I wanted to ask here first.