If you’ve ever worked with a trainer, attended a group class at the gym, or read a set of exercise instructions, you have, without a doubt, been told to “engage your core.” The fitness world is ...

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 ...

Some people work on their core because they’re hoping for a 6-pack or a flat tummy. But having a sturdy core provides you with much more than a toned look. A strong core — which includes the back, ...

The dead bug exercise may have a funny name, but it's a seriously effective move. The slow and controlled core strengthening exercise involves lying on your back and moving your arms and legs in a way ...