![Plank Up with Side tap](http://www.grouphiit.com/cdn/shop/products/plank_up_with_side_tap_{width}x.png?v=1509983582)
Start in plank position with arms and feet shoulder width apart, shoulders in line with wrists and a neutral back. Lower onto your elbows one arm at a time, reach each arm to tap the outside of the mat one at a time, then push yourself back up into a standing plank one arm at a time. Alternate which arm you lower first.