081008 CORE TWISTER (3-)11-18+ The equipment consists of a rotating round base and a curved bar for holding on to. The total height is 1,305 mm, and the base is at 136 mm. The Core Twister is like a carousel for grown-ups that won't make you dizzy! The motion improves core mobility and flexibility. The device is used for twisting the body from side to side. These kinds of movements are a part of our everyday lives. If the body's core is too stiff, sudden twists can cause pain.