How do you see core training in your running habit? is it a must for maintaining your PR? or just like chris mcdougall said ? ”we don't need those cross train or core training dose, just run if you want (he seems said it like that)”
so, how you do the core? after or before the running session? or you do it in separated time?I do a lot of core training because of a FUBARed back. I've noticed that running rough trails works my core, too. Smooth trails and roads? Not so much. If you mostly run on the latter, you might want to supplement.