Strengthen your arms, back, shoulders and core with a classic exercise you can do anywhere—the push-up. There’s a reason this exercise has been around for so long: push-ups work! They’re an easy and quick way to build muscle and see results. Push-ups are also a great way to improve your posture, prevent back injuries and strengthen your bone density. So keep up with our challenge calendar below!

Think this challenge isn’t tough enough? Try doing one of Coach Andy’s Push-Up Variations through the challenge instead.