If you’ve ever tried them, you know side planks are challenging­—even more than regular planks. But they’re a critical move, says Keli Roberts, an exercise physiologist with the American College of ...

This no-movement exercise is one of the most reliable ways to measure core endurance, posture control, and spinal protection—making it a favorite among U.S. fitness professionals.

The plank exercise has earned its place as a staple in fitness routines worldwide, combining simplicity with effectiveness. Whether you are a beginner or an advanced athlete, planks offer a versatile ...