Push-ups are a classic bodyweight exercise that primarily target the chest, shoulders, and triceps while also engaging the core and lower body for stability. They’re highly effective for building upper body strength and can be modified to suit any fitness level—from knee push-ups for beginners to explosive or weighted push-ups for advanced athletes. Proper form is key: keep your body in a straight line from head to heels, lower your chest just above the ground, and press back up without letting your hips sag or pike. Because they require no equipment and can be done anywhere, push-ups are a versatile and essential movement in any strength or conditioning program.