> unless you’re on the lower end of the BMI scale
Can you clarify, do you mean lower than 'normal' range (i.e. < 18.5), or lower than the US average (i.e. < 26), or what? And is this mostly anecdotal or is there evidence to support it (the view that running is a bad exercise for people above a certain BMI)? Not challenging this, I just haven't heard it before and am intrigued. And can you clarify what you mean by "any sport with a high mobility requirement?