Abstract: Disclosed an ergonomically improved computer mouse provides several advantageous features and is different in several respects from prior mice. A mouse (100) has an upper casing (101) and a bottom part (102) with spacings, which provide sufficient clearance between upper and rear surfaces of the mouse, and the user's fingers and their hand plane when their hand rests on a working surface in a naturally relaxed curled fingers and hand position while at the same time, their index and middle fingertips are placed in respective moulds or receptacles (117) and (118), which are formed on the upper surfaces of a primary button (105) and a secondary button (106). A wheel button (123) is placed between the moulds.

Abstract: A swing training device includes a guiding-arm and a resistance-arm that guides a user through a backswing and a forward swing allowing a user to hit a ball with a naturally swinging follow-through without any hindrance from the guiding components. Two computer-controlled electric motors provide rotation of the corresponding arms. The speed of rotation of the guiding-arm defines a pace of golf club movements. The speed of rotation of the resistance-arm defines the position of the club shaft relative to the user's forearms at each point of the backswing. During the forward swing the resistance-arm defines a pace of golf club movements, while the guiding-arm interactively resists the golf club movements through the guiding-arm lead, which is released from the guiding-arm by means of a trigger mechanism mounted on the distal end of the guiding-arm at a defined point of the swing controlled by the computer system a golf club.

Abstract: The golf swing training device interactively and passively guides a golf club throughout a training swing by a user from a golfer's stance up to an end of a backswing, and through a forward swing up to a ball impact zone, and that allows a user to hit a ball without any hindrance from the guiding components by naturally swinging follow-though. The guiding components are a guiding-arm, a short lead thereof connected to the distal end of a golf club tows interactively the club shaft up to the end of the backswing, and a resistance-arm, a finger thereof resists passively to the golf club movements throughout the backswing. A speed of rotation of the guiding-arm controlled by a computer system defines a pace of golf club movements, correspondingly a rhythm of the backswing, while a speed of rotation of said resistance-arm defines positioning of the club shaft and, correspondingly, the user's wrists positions relative to the user's forearms at each interactive moment of the backswing.

Abstract: Disclosed an ergonomically improved computer mouse provides several advantageous features and is different in several respects from prior mice. A mouse (100) has an upper casing (101) and a bottom part (102) with spacings, which provide sufficient clearance between upper and rear surfaces of the mouse, and the user's fingers and their hand plane when their hand rests on a working surface in a naturally relaxed curled fingers and hand position while at the same time, their index and middle fingertips are placed in respective moulds or receptacles (117) and (118), which are formed on the upper surfaces of a primary button (105) and a secondary button (106). A wheel button (123) is placed between the moulds.

Abstract: A training device which interactively guides a tennis racquet by exerting a towing force on a card which is connected to the tennis racquet. The device includes a vertically adjustable support connected with a guide pole fixed to a wall. A swivel arm is movably supported on the support and has a distal end which suspends a ball therefrom. The cord extends along the swivel arm and the support, and one end thereof is connected to the racquet through a stirrup.

Abstract: An exercise device for learning to guide a tennis racquet which includes an upwardly open ball track that is curved approximately like a horseshoe from a top view, and a support device by which the ball track is supported inclined on the ground in such a manner that the lowermost point of the ball track lies in an apex area of the curved track.