A physical therapist explains how a modified side plank with a clamshell strengthens runners’ core and hips to improve efficiency and reduce injury risk.

You've probably done it a thousand times, and maybe you've challenged yourself to hold it longer each time! The popular belief is: "the longer I hold, the stronger I am." And yes, holding is part of ...

You’ve seen those viral social media challenges. Someone holding a plank for what seems like an eternity, face contorted in agony, body trembling, all while the clock ticks mercilessly onward. Maybe ...

The plank is one of those timeless exercises that just keeps giving. Simple in concept yet incredibly effective, it's a staple in fitness routines for a reason: it's a fantastic way to build core ...

Keep your back straight and hold the plank for 30 seconds, then rest for 30 seconds. Repeat four times. We may earn commission from links on this page, but we only recommend products we back.