Holding the standard plank for ten seconds or longer is useless according to Dr. Stuart McGill. Unfortunately, many people still try to do planks for time.
A better way to progress this core exercise? Make it harder. The cable plank press will help you take your core strength to the next level, and you'll even build some extra upper-body muscle.
Christian serves up 3 innovative methods for taking your gains to new heights - one for biceps, one for arms in general, and a Bizarro World method that involves doing the opposite of everything you now do.