A strong core is the foundation of a strong body.
One of the best core exercises out there is the plank. It forces you to stabilize your body, engaging your entire core Plus, you’ll work your shoulders and your legs at the same time.
Your goal will be to maintain proper form the entire time you are holding up your own body weight. This means you will keep your whole body in a straight line, from your heels to your hips to your shoulders.