Close grip push-ups

Get on your hands and knees, with your hands positioned either directly under your shoulders or closer together (narrowe than shoulder-width apart).
Extend your feet backward and straighten your body so that your bodyweight is being supported by your hands and forefeet. If this is too hard for you bend at the knees and do the push-ups kneeling. This is your starting position. Like in the plank exercise, your whole body – shoulders, glutes, hips, knees ankles should be in a straight line.

Keeping your elbows tucked in to your body and your body straight and rigid, lower your chest to the floor.

Extend your elbows and push your body back up to the starting position.
Repeat for the recommended number of repetitions.