A spherical hand exerciser has a resilient, non-slip exterior with an off-center cavity and a weighted core housed within the cavity. A method of performing physical therapy with the exerciser includes grasping at least one exerciser; and manipulating it around the hand and fingers. The offset placement of the weighted core works stabilizer muscles of the fingers, hand, wrist, and forearm during manipulation, increasing the synergy and workable range of motion of both the flexor and the extensor muscles, allowing for faster learning and better effects.

A device for training a person to throw a ball includes a body. The body defines a first planar surface, a second planar surface, and a curved surface. The first planar surface is defined at a first end of the body. The second planar surface is defined at a second end of the body. The curved surface is defined between the first planar surface and second planar surface. The device has a center of mass that is located outside of the geometric center of the device.

A putting training device having the same size and feel of a standard golf ball yet adapted to exaggeratedly deviate from an expected line of action when mishit relative to a predefined line of action. The putting training device may have one or more inner cavities wherein an inner spherical object rolls along a tracked, concentric first curvature when the putting training device is struck with a putter accurately along the predefined line of action, and wherein the inner spherical object moves to a side portion of the one or more cavities upon the putting training device being mishit, resulting in the exaggerated deviation that affords the user a visual feedback they can learn from and recalibrate their future putts to.

A sports ball system for calculating movement characteristics has a sports ball. The sports ball monitors movement characteristics of the sports ball. A plurality of wearable devices is worn by a batter whom the sports ball is being thrown towards. At least one of the plurality of wearable devices receiving and displaying data transmitted by the sports ball and a remaining plurality of wearable devices recording data relating to movement of the batter.

A device has a lightweight inner bladder and an outer layer that covers the inner bladder. The inner bladder bunches up, crunches, becomes pleated, folded or the like against the inner surface of the outer layer. The bunched up surface of the inner bladder may be flattened and/or reconfigured upon impact, thereby absorbing energy. The bunched up inner bladder may create an uneven surface on the outer layer thereby altering the manner through which the device travels through the air. The device may be configured for any of a variety of sports or games such as, for example, a simulated soccer ball, football, rugby ball, baseball and/or softball, a tennis ball, a beachball or other oversized ball, a golf ball, a flying disc, a weighted punching bag, or any of a wide variety of devices for play and/or training.

A device has a lightweight inner bladder and an outer layer that covers the inner bladder. The inner bladder bunches up, crunches, becomes pleated, folded or the like against the inner surface of the outer layer. The bunched up surface of the inner bladder may be flattened and/or reconfigured upon impact, thereby absorbing energy. The bunched up inner bladder may create an uneven surface on the outer layer thereby altering the manner through which the device travels through the air. The device may be configured for any of a variety of sports or games such as, for example, a simulated soccer ball, football, rugby ball, baseball and/or softball, a tennis ball, a beachball or other oversized ball, a golf ball, a flying disc, a weighted punching bag, or any of a wide variety of devices for play and/or training.

This invention is associated with the sport of cricket in particular but not limited to and applicable to other sports and games as well where a ball is used to play. The invention relates that when a cricket ball having combinations of magnets inside with two different leathers (materials) or a combination of multi-leathers (materials) on the two hemispheres, is delivered by a bowler at a speed, an inherent swing is obtained, which is proportional to the difference in the resultant densities on the two hemispheres of the ball. The invention is aimed at providing a technology by which an inherent swing/drifted spin in the delivered ball is inevitably established which is irrespective of any seam positioning, other bowling skills, surrounding and pitch conditions.

A bowling ball can have an inner core layer that is shaped, constructed, and/or configured to provide the bowling ball with one or more prescribed properties or characteristics, and a cover stock layer comprising a liquid curable material received about the inner core layer. The bowling ball further has a riser pin feature that is at least partially defined by a passage extending through at least the cover stock layer and in which a filler material is received. The riser pin feature can be located in an opposite hemisphere of the bowling ball from a hemisphere including the true center of gravity and a marked heavy spot of the bowling ball and can be arranged within about 1 inch of an end of the Low Radius of Gyration Axis of the bowling ball.

A bowling ball can have an inner core layer that is shaped, constructed, and/or configured to provide the bowling ball with one or more prescribed properties or characteristics, and a cover stock layer comprising a liquid curable material received about the inner core layer. The bowling ball further has a riser pin feature that is at least partially defined by a passage extending through at least the cover stock layer and in which a filler material is received. The riser pin feature can be located in an opposite hemisphere of the bowling ball from a hemisphere including the true center of gravity and a marked heavy spot of the bowling ball and can be arranged within about 1 inch of an end of the Low Radius of Gyration Axis of the bowling ball.

A bowling ball can have an inner core layer that is shaped, constructed, and/or configured to provide the bowling ball with one or more prescribed properties or characteristics, and a cover stock layer comprising a liquid curable material received about the inner core layer. The bowling ball further has a riser pin feature that is at least partially defined by a passage extending through at least the cover stock layer and in which a filler material is received. The riser pin feature can be located in an opposite hemisphere of the bowling ball from a hemisphere including the true center of gravity and a marked heavy spot of the bowling ball and can be arranged within about 1 inch of an end of the Low Radius of Gyration Axis of the bowling ball.