HOW: Start on your hands and feet in a high plank position. Begin the exercise by bringing out your arm and leg on the same side, allow the opposite side to follow up towards that side and repeat in the opposite direction.
FEEL: The muscles in the shoulders in addition to the core will be working with this exercise.
COMPENSATION: Avoid your pelvis from rotating as you bring out your arm and leg. All of the same rules apply with a regular high plank position. Do not excessively hike or sag your hips or low back, do not let your shoulder blades wing with when you support your upper body with one arm.