In my opinion, wall planks are essential for developing ‘super’ inner core strength, full body muscle activation and conditioning for handtsands. I wouldn’t normally post topless exercise/yoga pictures, but this shows how the posture activates pretty much all the muscles in the body like a true ‘plank of wood’ with all the muscles in the body activated to hold this challenging position, much more so than when the plank pose is performed on the floor. Strength Training