Flutter kicks are an awesome core move to tone your lower abdominals. But you need to do it correctly to get the benefits. Here's how to do flutter kicks.

The Russian twist is an efficient, effective abs exercise. It strengthens all the muscles in your core, and also helps improve your balance and stability.

Two fitness experts share the differences between core vs. abs exercises, plus the best ways to strengthen each muscle group.

Regardless of your position on the fitness spectrum though, there are some common abs training mistakes by beginners you need to avoid at all costs. Here are 5 of them.

A physical therapist and fitness coach recommends resistance band ab exercises for improved core strength and more engaging workouts overall.

Celebrity trainer Jay Cardiello shares which exercises helped Jennifer Lopez get those incredible abs — and how you can achieve a rock-hard core after 50.