This 30 Minute Core Workout is designed to strengthen and work out all four layers of abdominals. This workout is focused on the powerhouse (the deepest layer of abdominals), and will also strongly work your transverse abdominals and well as your internal and external obliques, creating a flat, tightened and well defined stomach. Not only does this make you look great, it also builds strength through the powerhouse which will support your spine and posture. Enjoy!