A tennis ball comprises a hollow elastic circumferential core defining a primary outer surface pattern, and a textile outer layer extending over and about the core.

A substantially spherical hollow body, having a diameter of from 37 mm to 45 mm, in particular a diameter of 39.7 mm to 40.75 mm, and a weight of from 2.5 g to 3.5 g, in particular a weight of 2.6 g to 2.85 g, comprising a shell and an inner hollow space, wherein the shell has a wall thickness of 0.2 mm to 1.3 mm, in particular 0.3 mm to 0.8 mm, characterized in that the shell is free of celluloid and comprises at least one styrene-containing copolymer.

A substantially spherical hollow body, having a diameter of from 37 mm to 45 mm, in particular a diameter of 39.7 mm to 40.75 mm, and a weight of from 2.5 g to 3.5 g, in particular a weight of 2.6 g to 2.85 g, comprising a shell and an inner hollow space, wherein the shell has a wall thickness of 0.2 mm to 1.3 mm, in particular 0.3 mm to 0.8 mm, characterized in that the shell is free of celluloid and comprises at least one styrene-containing copolymer.

A tennis ball including a spherical hollow elastomeric core having a specific gravity of less than 1 and a thickness of at least 4.5 mm, and a textile layer covering the spherical elastomeric hollow core. The spherical hollow core has an initial internal pressure of no greater than 5 psi. The tennis ball has a first tennis ball rebound height when measured at a first time when the tennis ball is unused and a second tennis ball rebound height measured after the tennis ball is exposed to atmospheric pressure for four months following the first time and is unused. The second tennis ball rebound height being at least 96% of the first tennis ball rebound height.

A tennis ball including a spherical hollow elastomeric core having a specific gravity of less than 1 and a thickness of at least 4.5 mm, and a textile layer covering the spherical elastomeric hollow core. The spherical hollow core has an initial internal pressure of no greater than 5 psi. The tennis ball has a first tennis ball rebound height when measured at a first time when the tennis ball is unused and a second tennis ball rebound height measured after the tennis ball is exposed to atmospheric pressure for four months following the first time and is unused. The second tennis ball rebound height being at least 96% of the first tennis ball rebound height.

A toy ball which emits sounds as it is rolled and including a ball body and a plurality of mechanically-operated sound producing tubes carried within the ball body, each sound producing tube including a sound-producing device which moves by the force of gravity, and each sound producing tube lying along a longitudinal axis, in which the axes are transverse to one another so that the sound producing devices emit sound when the ball is rolled along various axes. The ends of the sound-producing tubes are held by sleeves that are molded as integral parts of the ball body.

Disclosed are an exercise ball as well as a system, method and computer program product for monitoring the use of the exercise ball by a user. An exemplary system comprises: a first data processing unit; an exercise ball comprising a shell and a monitoring unit operatively associated with the shell, said monitoring unit comprising at least one sensor for detecting a parameter representative of the movement of the exercise ball by the user, the first data processing unit being configured to determine and provide the user with data representative of the use of the exercise ball by the user based on parameters representative of the movement of the exercise ball by the user detected by said at least one sensor.

Disclosed are an exercise ball as well as a system, method and computer program product for monitoring the use of the exercise ball by a user. An exemplary system comprises: a first data processing unit; an exercise ball comprising a shell and a monitoring unit operatively associated with the shell, said monitoring unit comprising at least one sensor for detecting a parameter representative of the movement of the exercise ball by the user, the first data processing unit being configured to determine and provide the user with data representative of the use of the exercise ball by the user based on parameters representative of the movement of the exercise ball by the user detected by said at least one sensor.

A workout pouch comprising multiple pieces of fabric fastened together to form a spherical receptacle to securely contain a medicine ball is disclosed herein. The spherical receptacle facilitates working out using the medicine ball. The workout pouch conforms to the size and shape of the medicine ball. The pouch secures the medicine ball so as to prevent the medicine ball from shifting within the pouch during exercise. The pouch may also include one or more support patches to enhance its structural integrity and resistance to wear-and-tear damage. The workout pouch may include straps and strap fasteners to allow a user to fasten the straps to the user's body. The pouch may also include a ball fastener to properly secure a medicine ball within the body of the pouch and a ball fastener protector that prevents the ball fastener from being exposed while the pouch is in use.

A workout pouch comprising multiple pieces of fabric fastened together to form a spherical receptacle to securely contain a medicine ball is disclosed herein. The spherical receptacle facilitates working out using the medicine ball. The workout pouch conforms to the size and shape of the medicine ball. The pouch secures the medicine ball so as to prevent the medicine ball from shifting within the pouch during exercise. The pouch may also include one or more support patches to enhance its structural integrity and resistance to wear-and-tear damage. The workout pouch may include straps and strap fasteners to allow a user to fasten the straps to the user's body. The pouch may also include a ball fastener to properly secure a medicine ball within the body of the pouch and a ball fastener protector that prevents the ball fastener from being exposed while the pouch is in use.