The advice is common — and vague. Here’s how to do it properly. By Hilary Achauer When I began weight lifting in my late 30s, my coaches often gave me a somewhat baffling cue. “Engage your core,” they ...

A strong core is not only a total flex—literally—it’s key for building total-body strength that carries over into everyday movement. Training your core functionally can help you get there. Functional ...

How to: Start standing on the mat, feet hip-width apart. Bring elbows together and up, arms in a 90-degree angle. Keeping core stable, open elbows as wide as possible and then bring them together ...