Begin in the Push Up position. Hands about shoulder width apart, in posterior pelvic tilt (Tuck your tailbone) and core braced. Be sure to generate total body tension.
Perform one Push Up.
As your return to the top, leave your feet where they are, but walk both hands to your left.
Perform another Push Up, and then walk your hands to the right. Repeat this pattern, moving your hand position in between repetitions, and repeat as required.
Stay tight throughout, sagging the hips or arching the back at any point, and don't flare your elbow out, keep them tucked in.