Training device for throwing a ball

摘要

A throwing exercise apparatus using a sphere with an internal polar passageway to deliver end portions a non-elastic band of which one end portion circumscribes the outer surface of the sphere and extends to the other end portion where they are joined together by a fastener. The band is then joined by an elastic member to an anchor so that in use there is established a path of elastic resistance along a tangential line formed by the wrapped part of a strap mid portion in response to an applied force comprising both translation and rotational motions of the sphere. The motions of the sphere bring about rotation of the internal polar passage in an end-over-end fashion.