MOSSA Group Centergy This is the CD, DVD, choreography sheet, and case from January 2018. Group Centergy is a fitness program by MOSSA that incorporates elements of yoga and Pilates to balance the mind and body. Set to upbeat music, it improves flexibility, strength, core stability, and concentration in a short amount of time. There is no intense exercise, so beginners and seniors can safely enjoy it at their own pace. Please understand that this is a used item that has been stored at home before purchasing. The CD and DVD have both been tested and play without any problems. Thank you for looking.