Core

These eight unorthodox exercises are just the thing to reactivate your midsection and solidify your six-pack.

Here's a four-exercise, no-crunch abs circuit that you can perform daily to build core strength and overall abdominal muscle tone.

Use these landmine variations for a full-body workout.

These single-leg poses and twists activate your abdominal muscles to improve your posture and reduce lower back pain.

This high-intensity ab circuit will make you feel the burn even in the cold!

Congratulations! You've mastered the 5-minute plank.