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 luminous safety ball including an inner glowing body and a foam sphere covering the inner glowing body is provided. The inner glowing body is not a perfect sphere, the foam sphere has a non-uniform thickness, and light emitted by the inner glowing body passes through the foam sphere and permeates through a surface of the foam sphere to form light with different brightness thereon.

A luminous safety ball including an inner glowing body and a foam sphere covering the inner glowing body is provided. The inner glowing body is not a perfect sphere, the foam sphere has a non-uniform thickness, and light emitted by the inner glowing body passes through the foam sphere and permeates through a surface of the foam sphere to form light with different brightness thereon.

A plastic ball having a generally spherical shape with a plurality of depressions located in only one hemisphere of the ball and lying along circumferences of the ball that pass through the center of the hemisphere, in which the depressions are equally spaced radially about the center of the hemisphere.

A hand-held centripetal exercise devices are shown and disclosed. In one embodiment, the device includes an outer shell having a smooth outer surface. The outer shell defines an internal volume. The device additionally includes a single ball sized to be contained within the internal volume. The single ball having a predetermined mass.

A lightweight spherical baseball like training ball has a hollow polyethylene plastic core adhered to a stitched white colored synthetic leather cover with a thin layer of adhesive. The lightweight ball has raised seams and measures in circumference similar to the ball circumference size mandated by Major League Baseball or softball rules whereby the ball is suitable for baseball and softball training and playing variations of the game of baseball or softball in confined areas.

A lightweight spherical baseball like training ball has a hollow polyethylene plastic core adhered to a stitched white colored synthetic leather cover with a thin layer of adhesive. The lightweight ball has raised seams and measures in circumference similar to the ball circumference size mandated by Major League Baseball or softball rules whereby the ball is suitable for baseball and softball training and playing variations of the game of baseball or softball in confined areas.

The present invention relates to wobbly balls and exercise coil springs. A wobbly ball may include a non-spherical rigid, hollow ball body formed of two halves, each half comprising an upper ladle or a lower ladle which are welded together along a central seam therebetween, and defining a hollow cavity therein. A spherical inner ball is captured within the hollow cavity of the hollow ball body of the wobbly ball, so that upon movement of the wobbly ball, the inner ball rolls within the cavity, producing a wobbly, eccentric motion. The exercise coil spring may be formed of a single coiled wire, the coiled spring including a central portion where the coiled wire is coiled to a first diameter that is constant. Opposed flared ends are provided ends of the central portion where the coiled wire is progressively coiled from the first diameter to a second diameter, which is greater.

The present invention relates to wobbly balls and exercise coil springs. A wobbly ball may include a non-spherical rigid, hollow ball body formed of two halves, each half comprising an upper ladle or a lower ladle which are welded together along a central seam therebetween, and defining a hollow cavity therein. A spherical inner ball is captured within the hollow cavity of the hollow ball body of the wobbly ball, so that upon movement of the wobbly ball, the inner ball rolls within the cavity, producing a wobbly, eccentric motion. The exercise coil spring may be formed of a single coiled wire, the coiled spring including a central portion where the coiled wire is coiled to a first diameter that is constant. Opposed flared ends are provided ends of the central portion where the coiled wire is progressively coiled from the first diameter to a second diameter, which is greater.

An apparatus for assisting and improving baseball hitting is described. The apparatus includes a spherical object having an interior anchor and a cord extending therefrom. An adjustable mass body is disposed within the spherical object along the cord. The interior anchor allows the spherical object to rotate about the cord.