An ab workout, as with any other targeted exercise, should be varied or rotate between specific exercises for the best results. Adding the plank pose to a routine builds endurance in the back and arms as well as the abs. An isometric, the plank pose tightens theabdominals as they help support the rest of the body.
Hold for twenty to sixty seconds, as your current level of fitness allows, then lower back to the floor.
Repeat three to five times.
The plank pose develops a strong core as well as strong arms and back strength.