This disclosure shows a skating device designed to enable the user to perform the physical movements required when ice skating in artificial conditions, such as, for example, when there is no readily accessible ice rink or frozen lake. As such, the skating device can be used indoors at any time of the year. The device itself consists of a frame with a step for each foot on an approximately horizontal, pivotable guide. Each step is slidingly movable along its pivotable guide. Biasing force means, arising from the use of suitable weights, oppose the skating movements of the user and restore the parts of the skating device to their initial rest positions following these movements. The frame includes a horizontal pole, whose position is adjustable, for gripping by the user's hands.

A timing system for providing consistent tow times in waterskiing competition by determining the position of the tow vehicle on the course relative a reference time and method of use are disclosed. The timing system includes timing means for indicating intermediate elapsed reference times that a tow vehicle would have if it was completing the course within the required time and speed tolerences, acutating means, electrically connected to the timer, for synchronizing the start of the timer with the entry of the vehicle on the course, and a communicator, electrically connected to the timer, to provides cues to the operator for comparison with the tow vehicle's actual position on the course. Methods for determining the position of the tow vehicle are also disclosed.

An alpine ski simulator for reproducing the basic corporal movements involved in downhill skiing, comprising a frame which may be set at different angles relative to the horizontal plane, and a handrail for equilibrium purposes. A rotatable platform, horizontally mounted on the frame through a central shaft has roller means set between the platform and the frame to ease the rotation. A fixed band encircling the platform, guided between two pairs of posts, and connected to the frame, is provided for braking purposes. Adjustable means are attached between the band and the frame to increase or reduce the tension of the band against the platform and thus, vary the rotational speed of the platform.

A portable device for exercising front thighs having a non-use position for carrying by a hand of a user and a use position for placement on a horizontal surface and for exercising the front thighs of the user. The device includes a base, foot restraints, a pair of support straps, and a rod. The base is placed on the horizontal surface when the portable device for exercising front thighs is in the use position. The feet restraints are disposed on the base for restraining the feet of the exerciser when the portable device for exercising front thighs is in the use position. The pair of support straps extend from the base for supporting the exerciser when the portable device for exercising front thighs is in the use position. The rod is placed behind the knees of the exerciser when the portable device for exercising front thighs is in the use position and engages the pair of support straps for further supporting the exerciser when the portable device for exercising front thighs is in the use position.

A multipurpose body exerciser includes an I-shaped bottom block mated with a vertical main frame and a support frame for mounting of a seat and a back cushion on the main frame. The exerciser further includes two elongated foot-pedals disposed at both sides of the vertical main frame, each respectively suspended by a steel cord hung on a pulley block to provide the foot-pedals for training of the legs. Two vertical rocker rods are provided on opposing sides of the vertical main frame for training of the arms. The foot-pedals and the rocker rods are adjustable by associated hydraulic cylinders, to provide a predetermined tension for providing the best performance appropriate to a user's condition. The whole structure may be divided into three independent portions for convenient transportation or packaging to minimize space requirements.