An exercise device that allows a user to strengthen the entire anatomical core muscles with a lightweight, compact, and portable design. A device includes a housing that is substantially spherical in shape with a hollow portion therein. The housing has at least one protrusion. A ball that is substantially spherical in shape is positioned within said hollow portion such that said housing at least partially encloses the ball therein. A plurality of bearings are disposed between said housing and said ball. The bearings contact the housing and the ball, thereby allowing said housing to rotate about said ball. A plurality of handles detachably connect to the at least one protrusion.