Abstract: According to one aspect of the present invention, there is provided a compact exercise unit, which comprises a body attachable to a standard swivel chair leg in a removable manner. The body has at least one internal cavity and at least one exercise element. The exercise element has a first and a second end, the first end being fixed to the body. The element is extendable between a non-extended position and an extended position in which the second end of the element protrudes from the body. The cavity being adapted at least for storage of said element at least in said non-extended position.