Dolphin Plank: Get into plank position with your forearms and palms on the bed, and your shoulders stacked over your elbows. Your body should form a straight line between your head and your heels. Keeping your core tight and legs straight, lift your hips straight up into the air. Pause, then release to starting position with control to complete one rep.
Where you’ll feel it: Your forearms, abs, and obliques.