An exercise ball with internal weight with two shell portions, at least one internal plate weight, and at least one strap with engaged with the plate. The shell portions have at least one internal plate relief, and at least one external relief formed on an outer surface of the shell to allow access to an inside of the shells. The plate has at least one alignment aperture for retaining the plate in the internal plate relief of the shell portions, and at least one connection area comprising a slot on the plate to allow the attachment to slide therethrough to retain the plate in the relief of the shell portions. The strap extends outside of the shells through the at least one external relief when the two shells are connected together around the plate.

An exercise ball with internal weight with two shell portions, at least one internal plate weight, and at least one strap with engaged with the plate. The shell portions have at least one internal plate relief, and at least one external relief formed on an outer surface of the shell to allow access to an inside of the shells. The plate has at least one alignment aperture for retaining the plate in the internal plate relief of the shell portions, and at least one connection area comprising a slot on the plate to allow the attachment to slide therethrough to retain the plate in the relief of the shell portions. The strap extends outside of the shells through the at least one external relief when the two shells are connected together around the plate.

A modular exercise bar and weight system is provided. The system includes a first bar, a second bar, and a third bar. Each bar includes an attachment mechanism on each end such that the bars may be connected end-to-end in a variety of different configurations. The system also includes one or more weight members configured with compatible attachment mechanisms such that the weight members may be attached to the ends of the modular bars to increase the weight of the bars. The weight members also be attached to one another so that multiple weight members may be attached to any end of any bar combination.

A weight training platform designed to have the ability to use free weights and resistance bands simultaneously, which can increase muscle strength and endurance with repetitive movements and has the advantage of being inexpensive, space conscious, and portable.

Exemplary embodiments of a workout station and methods of using the workout station are provided.

In one embodiment a fitness device is disclosed. The fitness device may include a central handle having a body with a central aperture through the body. The device may also include a first rod removably coupled to the central handle at a first location and a second rod removably coupled to the central handle at a second location, opposite the first location. The device may also include an elastic member having a first end and a second end, the first end being coupled to the first rod and the second end being coupled to the second rod.

Disclosed is a posture coaching method for weight training, which includes sensing an exercising motion of a user by a sensor module that is attached to a part of the body of the user or exercise equipment gripped by the user for exercising; calculating an inherent angle of the sensor module and a linear acceleration of each axis of a user-based coordinate system based on the user by using the sensed value; analyzing an exercising posture of the user by detecting and classifying a pattern of the linear acceleration and the inherent angle; and generating exercising posture correction data based on the classified pattern.

Disclosed is a posture coaching method for weight training, which includes sensing an exercising motion of a user by a sensor module that is attached to a part of the body of the user or exercise equipment gripped by the user for exercising; calculating an inherent angle of the sensor module and a linear acceleration of each axis of a user-based coordinate system based on the user by using the sensed value; analyzing an exercising posture of the user by detecting and classifying a pattern of the linear acceleration and the inherent angle; and generating exercising posture correction data based on the classified pattern.

A modular weight training bag system, made up of a main bag constructed of heavy pliable fabric with a zipper-less closure, an inner lining that holds a granular material which adds weight and volume to the main bag, and also has a uniquely designed closure, using various size pouches to increase weight, an add-on weight attachments installed on the main bag for the purpose of quickly increasing the weight of the bag, a capsule sleeve for securing two main bags together, and a soft shell constructed to cover the main bag or capsule sleeve.

Provided is a weight-adjustable dumbbell, including a grip bar assembly, a dumbbell seat, a plurality of dumbbell discs placed on the dumbbell seat; the grip bar assembly includes a plurality of hanging discs arranged adjacent to each other and are rotated synchronously, and the hanging discs are rotated relative to the dumbbell discs to setting positions to engage with or disengage from the dumbbell discs. The grip bar assembly also includes at least one stopping mechanism, each stopping mechanism includes at least one locking component, and the dumbbell seat is provided with a limiting hole for the locking component to be engaged with. When the hanging discs are rotated to a setting position, the locking component is disengaged from the limiting hole to maintain an unlocked state. When the hanging discs are rotated between two setting positions, the locking component is inserted into the limiting hole to maintain a locked state.