The Balance Board packs a punch in a small space. The spring base offers an added challenge as muscles work to react to completing familiar exercises in a new context. The board wobbles and flexes as the user attempts standing squats, single leg lifts, or even push ups. The convenient handles routed into the surface provide comfortable grips for arm exercises like push ups and dips. This truly is a full body gym in a small package. Designed to emulate the benefits of a stability fitness ball. Designed for ages 13 and up.