Close-grip push-up (on knees)

Start by getting on your hands and knees, with your hands shoulder-width apart and your knees hip-width apart. Lower your upper body towards the ground by bending your elbows, keeping them close to your sides. Pause for a moment when your chest is just above the ground. Push through your palms to straighten your arms and return to the starting position. Repeat for the desired number of repetitions.