In many circumstances adding weight to core exercises is not the best way to
progress the difficulty. Creating instability and/or adding additional movement
to core exercises such as the floor plank is a better way to progress the
exercises for most people. In addition to the extra muscles being used during
the exercise, core exercise progressions such as the plank with abduction
practices maintaining core stabilization during any movement which is very
important for later on. During this plank with abduction it is essential to
maintain the correct pelvic rotation and keep the core drawn in. The plank with
abduction can be added to any core workout or be used as part of a circuit
training program.