Knee push-ups, often referred to as modified push-ups, are a beginner-friendly variation of the standard push-up exercise. To perform a knee push-up, start by kneeling on the ground with your hands placed shoulder-width apart. While keeping your body in a straight line from your head to your knees, lower your chest towards the floor, and then push back up. This variation allows individuals with limited upper body strength to build strength and gradually progress to full push-ups.