We’ve already shared with you the benefits of the static plank, but this move can be made dynamic by adding a twist. Work on your obliques by adding a rotating motion either with an extended arm or a modified crunch.
Planks are a great abdominal workout without the sometimes painful demands of a conventional sit up. Core abdominal muscles are engaged while adding a turning motion targets other key areas through lengthening and contracting of the muscles. Once you feel confident with the plank, start to add variations, such as the twist, to spice up a plank position.