This video clip is from Cathe’s STEP BOSS bonus Ab Stacker workout which is included on the STEP BOSS PHA 3 and Step Sync Workouts. Ab Stacker utilizes the risers from your step for added resistance in a unique and different way to strengthen and tone your entire core region. If You're Planning On Pre-Ordering Step Boss You’re Running Out of Time! Here’s How to Avoid Missing Out!!! Pre-Order Cathe's Step Boss Workout DVDs now at https://bit.ly/2WNcAVC