A proper plank strengthens your core, back, shoulders, and glutes while preventing injury. Here’s how to do it correctly: Start Position: Begin on the floor, face down. Place your elbows directly under your shoulders and forearms flat on the ground. Extend your legs straight back, toes tucked under. Body Alignment: Keep your head, neck, spine, and legs in a straight line (avoid sagging or arching your back). Engage your core by pulling your belly button toward your spine. Squeeze your glutes to