Abstract: A training device for competitive swimmers in the form of a drag producing belt adapted to be worn over the swimmer's regular suit or trunks. The drag producing belt adds weight and increases the resistance (drag) to the swimmer's movement through the water and thus helps in the development of the swimming muscles. The increased drag is caused by normally open ended pockets that are secured to the belt in such a manner that they act as scoops as the swimmer moves through the water. Water entering the pockets is impeded in flowing through them whereby the drag is created. The pockets are located on the belt so that the drag is distributed evenly on the swimmer with no imbalance tending to cause the swimmer to roll or dip.

Abstract: An exercising device which yields a variable, programmed speed for regulating the user's movement is disclosed. The device includes a user interfacing device for input of the user's efforts, a variable speed regulator connected to and driven by the interfacing device, a user position sensor also connected to the interfacing device, and a speed programmer connected to both the position sensor and the variable speed regulator. By means of a varying references voltage which it delivers to the speed regulator, the programmer establishes a preselected pattern of varying speed to regulate the user's movement. The user position sensor may take a variety of forms. It may sense the absolute position of the user in the range of motion of the exercise, it may measure the distance of the user from the starting point, or it may calculate the user's position according to time elapsed from the beginning of movement in the exercise.