When it comes to core strength, the plank exercise is like that best friend you can always rely on. The harder-than-it-looks move never lets you down because it strengthens every muscle in your core (not just the abs you can see) while also working your shoulders, butt, and legs. That's why this workout made up of plank variations is a must-try.Planks are usually static (or still), but you'll challenge yourself to incorporate small movements as well as engage additional muscles like your inner thighs to up the intensity. You don't need any equipment for this one (an exercise mat is optional).FEATURES Work up a sweat in less than the time it would take you to drive to your gym with this simple routine. Best of all, you don’t need any equipment to jump right in.● start whenever you want & get ready for your transformation● 8 high intensity exercises to archive your best● always know your next exercise