tool for use in sport and amateur tennis

摘要

A device for gymnastics play and sport comprises a circular or oval tubular ring having a support 13 affixed to the centre to rest on the ground so that the user can rotate the ring by displacement of the weight of his body and the outer periphery of the ring rolls in a path around the point of contact of the support with the ground. The ring has on its periphery at least two hand grips 11, 12 with associated diametrically opposite foot supporting rests, and the support 13 may be adjustable in length or resilient in an axial direction. A rubber hemisphere 10 may cover the end of the support. IMAGE