We have now posted a video clip from our second circuit workout in the Shock Cardio series. Core Circuit, 51 minutes, is broken into five fitness rounds and is very cardio intensive. In each round you will do three short cardio drills back to back and then repeat them (so it’s six cardio bursts per round). After each of these cardio groupings you will do intense functional core work. Other than an exercise mat, no equipment is needed for this workout. – View Clip | Purchase