A push-up is a popular exercise that helps strengthen the muscles in your arms, chest, and core. To perform a push-up, you start in a plank position with your hands placed slightly wider than shoulder-width apart. As you lower your body towards the ground, you bend your elbows, keeping your back straight. Then, you push yourself back up to the starting position. This exercise can be done anywhere, making it a convenient choice for fitness enthusiasts. Variations of the push-up, such as the knee push-up or diamond push-up, can target different muscle groups and accommodate various fitness levels.