Abstract: An exerciser which includes a belt shaped for encircling the waist of a user, and attachment thereabout in a selected orientation. A flexible line with handles attached to opposite ends is slidingly connected with the belt for longitudinal, reciprocating motion of the flexible line with respect to the belt. While jogging, the user can simultaneously exercise his upper body muscles by grasping the handles in opposite hands, and alternately pushing one handle forwardly, while simultaneously resisting rearward movement of the other handle, thereby isometrically exercising the user's arm and upper body muscles.