I was wondering about the term, "engage your core" the other day. How do I know (when swimming, let's say front crawl) when I've done it correctly (or at all)? Is it sufficient to "suck my navel to my spine"?
I was wondering about the term, "engage your core" the other day. How do I know (when swimming, let's say front crawl) when I've done it correctly (or at all)? Is it sufficient to "suck my navel to my spine"?