<iframe src="https://player.vimeo.com/video/271767242?background=1&quot; width="640" height="360" frameborder="0" allowfullscreen></iframe>

Perform a push-up on your toes (or knees if needed), driving one knee into your elbow at the top of the push-up. Repeat this sequence while alternating knees until the desired number of reps is reached.