an exercising device which includes a cuff and a mitt usable separately or together . the cuff being a body of flexible material arranged with a central opening therethrough , and including an inner surface of an elastic material to be placed against the skin of a user , an outer surface of an elastic material , the inner and outer surfaces being joined but spaced apart to form a space . there is a flexible ballast material disposed in the space between the inner and outer surfaces and an elastic material . there is a separation disposed along the body , including a strong velcro strap , and a flexible attachment , and there is webbing of an elastic material disposed at the inner surface and outer surface as well as an o - ring attached to the outer surface .