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 ...

YOU PROBABLY THINK you know how to do a plank. The ab training staple is relatively simple, after all—boiled down to the basics, all you need to do is get down on the ground and hold in place.

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 ...

Think you have a strong core? This ultimate core test will challenge your endurance, stability, and total-body control. The 1-minute plank challenge is a deceptively simple way to measure your core ...

See how long you should hold a plank after 50 to go from building to elite, plus tips to safely boost core strength.