HOW: Begin in the quadruped position with your back flat, knees on the ground underneath the hips, and your hands underneath your shoulders. From here, shift your weight forward onto your hands until it is as far as you can comfortably go. Shift back to the starting position and repeat.
FEEL: You should feel your shoulder muscles working when shifted forward, increasing as you put more weight on them.
COMPENSATION: Keep your elbows straight as you go forward.