Described herein is a multi-purpose portable platform stage for elevating a platform of the stage over a surface on which the stage is placed, that can be converted by a single person individually without assistance from an operational configuration in which one or more persons can stand, move and operate on the platform without the platform collapsing, and in which one or more objects can be placed and used on the platform, by or without such persons, without the platform collapsing, to a portable configuration in which the single person can carry the stage individually without assistance.

Described herein are devices and systems relating to sports training equipment, for example, for baseball. These devices and systems can comprise a mat with markers identifying a plurality of positions on the mat. In some embodiments, the system can comprise removably attachable footpads to identify ideal foot positions for an athletic performance. In some embodiments, the footpads comprise one or more pressure sensors. The system can comprise one or more position sensors on a ball, and one or more position sensors removably attachable to a hand-held sports instrument. In some embodiments, the system can comprise a memory, communicatively coupled to a processor and a camera, with executable instructions to implement a set-up component, a user recognition component, a practice component, and instructional component, and a play component.

A folding mat includes a first cover part into which a plurality of first cushioning materials are inserted; a second cover part into which a plurality of second cushioning materials are inserted and which is foldably connected to the first cover part; a first opening and closing part formed from a first point of a first side of the first cover part to a second point of a second side of the first cover part, and opening at least two sides of the first cover part to allow the plurality of first cushioning materials to be inserted; and a second opening and closing part formed from a third point of a third side of the second cover part to a fourth point of a fourth side of the second cover part, and opening two sides of the second cover part allowing the plurality of second cushioning materials to be inserted.

A retractable exercise system having a longitudinal axis, an expanded configuration, and a retracted configuration. The system may include a plurality of support bodies and a retractor. The plurality of support bodies may have a top support surface forming a continuous layer, a bottom support surface forming a first segmented layer, and a middle support surface forming a second segmented layer between the top and bottom support surfaces, and a plurality of interconnect areas having respective channels. The retractor may be positionable through the respective channels.

A multi-layer exercise mat including a first layer including an outer surface and an opposing inner surface, the opposing inner surface of the first layer including a first array of three-dimensional features integral with the first layer; and a second layer including an outer surface and an opposing inner surface, the opposing inner surface of the second layer including a second array of three-dimensional features integral with the second layer. The first and second arrays of three-dimensional features are configured to grip each other to removably secure the inner surface of the first layer to the inner surface of the second layer.

Described herein is a multi-purpose portable platform stage for elevating a platform of the stage over a surface on which the stage is placed, that can be converted by a single person individually without assistance from an operational configuration in which one or more persons can stand, move and operate on the platform without the platform collapsing, and in which one or more objects can be placed and used on the platform, by or without such persons, without the platform collapsing, to a portable configuration in which the single person can carry the stage individually without assistance.

A barre exercise device providing balance support for a user during exercise may include a horizontal barre exercise bar and a pair of brackets. The horizontal barre exercise bar is elevated above a floor surface by supporting structure in contact with the floor surface. The pair of brackets is attached to the supporting structure. Each bracket of the pair of brackets is adapted to support one or more hand weights therein. The device is lightweight yet structurally configured so as to support a user's entire weight thereon.

An assembly is disclosed. The assembly is movably-disposed upon an underlying support surface. The assembly includes a body having an upper surface and a lower surface. The body defines a pair of front axle-receiving openings and a pair of rear axle-receiving openings. A front axle member extends through the pair of front axle-receiving openings. A rear axle member extends through the pair of rear axle-receiving openings. A first front wheel is connected to a first end of the front axle member. A second front wheel is connected to a second end of the front axle member. A first rear wheel is connected to a first end of the rear axle member. A second rear wheel is connected to a second end of the rear axle member. The upper surface of the body is pitched at an angle with respect to the underlying support surface. An exercise system is also disclosed. A method is also disclosed.

A plurality of motion sensors capable of capturing IR video, depth video, and RGB images. Periodically emitting IR pulses. Capturing IR video, depth video, and RGB images of a user. Generating a point cloud of the user. Generating a 3D model of the user including the point cloud of the user. Inputting the IR video, depth video, and RGB images into a machine learning model. Estimating a set of joints of the user in the 3D model. Tracking, based on the estimated set of joints of the user in the 3D model, the user's motion over a period of time. Determining a number of repetitions of an exercise performed by the user. Determining a feedback value. Calculating, based on the number of repetitions and the feedback value, a user exercise score. Providing, via a graphical user interface, the user exercise score and the feedback value to the user.

An exercise device that may be used to perform a complete exercise routine. In some implementations, the device includes three block members. A first block may be in the form of a modified rectangular prism. Sides of the first block may have cutouts extending downwardly from the top of the block for receiving a user's feet or elbows for exercises. A portion of the front side of the first block may slope inwardly toward the bottom of the block, and a portion of the top may slope inwardly toward the front side. At the junction of the top and front sides, a rectangular notch may be provided for cradling a user's upper arm or lower leg for exercises. A second block may be in the form of a rectangular prism, and may be joined to the first block for use in some exercises. A third block may be in the form of a truncated triangular prism, and may be positioned between the first block and the ground to tilt and/or stabilize the first block during some exercises. The sides of some of the blocks may incorporate a surface feature to enable the blocks to interlock with each other.