The Aero-Step XL can be used for balance training and functional training. It enables an improvement in joint stability. The muscles are tightened and strengthened deep down. Equipped with over 1000 round nubs for additional stimulation of the foot reflex zone points, this product provides an additional massage effect for better blood circulation. Whether standing for leg axis training or in a prone or supine position, thanks to the air filling this product makes every known exercise a challenge. This product has a 440lb/200kg weight capacity.