A stepping exercise machine includes a base and a pedal. The base is provided with an undulating slide rail. A top end of the slide rail is defined as a peak. Bottom ends of two sides of the peak are defined as troughs. The two sides of the peak or the bottom ends of the troughs are provided with stop blocks, respectively. An underside of the pedal is pivotally connected with rollers. Two sides of the underside of the pedal are fixedly connected with a pair of stretchable elastic members. The other ends of the pair of stretchable elastic members are fixed to two sides of the base. The rollers support and drive the pedal to reciprocate along the undulating slide rail ups and downs by means of the stretchable elastic members.

A resistive training device to be worn by a user can include a first and second skate device configured to be worn on the user's feet. The first and second skate device can include a first plurality of attachment mechanisms. The first plurality of attachment mechanisms can include an interior attachment mechanism; an exterior attachment mechanism; and a rear attachment mechanism. The resistive training device can also include a belt configured to be worn around the user's waist. The belt can include comprising a second plurality of attachment mechanisms which can include a left hip attachment mechanism; a right hip attachment mechanism; and a tailbone attachment mechanism. The resistive training device can also include a plurality of resistive elements. Each resistive element can be removably connected to one of the first plurality of attachment mechanisms and one of the second plurality of attachment mechanisms.

An exercise assembly for practicing in-line skating includes a base that has an upper surface with a smooth texture to provide minimal friction to sliding. Each of a pair of front tubes and each of a pair of rear tubes extends perpendicularly from a respective opposing side of the base. A crossbar extends between the pair of front tubes distal from the base. Each front tube comprises a plurality of nested sections. Each rear tube comprises a plurality of nested segments. The front tubes and the rear tubes are selectively extensible from the base. Each of a pair of side bars extends between a respective front tube and an associated rear tube. The side bars and the crossbar are selectively positionable relative to the base and are configured to be grasped in hands of a user to support the user exercising on the base.

A high-speed skatemill with a movable skatemill belt that includes a movable skatemill belt mounted on the rotating drums and where the working area of the movable skatemill belt is supported by stationary rigid sliding pads with integrated distribution channels for distributing a compressed gas or gas mixtures into the injection openings or slits. The compressed gas or the compressed gas mixture optionally enriched with an anti-friction medium in the form of a vapor or aerosol or dispersion containing solid dust particles or solid microparticles is injected through the inlet openings. By means of the anti-friction applicator, the anti-friction medium is applied to the movable skatemill belt, which then transports the medium to the points of contact with the fixed rigid sliding pads. Stationary solid sliding pads can be cooled down by liquid and/or gaseous cooling medium circulating by default in the hollow support beams of the stationary solid sliding pads.

Described herein is a modular skate system that includes at least one modular skate component comprising a major surface, a core comprising a body formed from a first material, an outer layer formed from a second material, the outer layer surrounding at least a portion of the core, wherein the first material is different from the second material, and wherein the major surface comprises the outer layer.

Repulsive force created by actuated permanent magnets is used to levitate and transport heavy loads. A bed of permanent magnets is selectively actuated to levitate an array of magnets positioned above the bed, such that the magnets in the levitated array are opposed to the actuated magnets, and of the same magnetic pole, thereby creating a repulsive force. The actuated magnets are vertically offset from magnets in the bed of permanent magnets that have not been raised, thereby imparting maximum levitation forces to the magnets in the levitated array. These systems can levitate and transport objects over level or sloped surfaces, in a straight path or along curves and corners. A bed of magnets can be attached to the floor, or to a set of moving decks that rearrange themselves in a desired path. Our systems can simulate walking or running, similar to a treadmill or virtual gaming platform.

An ice-skating measuring apparatus includes an ice-skate blade holder and an ice-skate blade. The blade holder has a front beam column and a rear beam column. The blade includes at least one sensor configured to measure forces acting on the blade, and the blade is detachable from the blade holder.

An exercise assembly for practicing in-line skating includes a base that has an upper surface with a smooth texture to provide minimal friction to sliding. Each of a pair of front tubes and each of a pair of rear tubes extends perpendicularly from a respective opposing side of the base. A crossbar extends between the pair of front tubes distal from the base. Each front tube comprises a plurality of nested sections. Each rear tube comprises a plurality of nested segments. The front tubes and the rear tubes are selectively extensible from the base. Each of a pair of side bars extends between a respective front tube and an associated rear tube. The side bar and the crossbar are selectively positionable relative to the base and are configured to be grasped in hands of a user to support the user exercising on the base.

A system and method for using performance signatures can include generating a set of performance features during an activity of the first participant by collecting kinematic data from at least one inertial measurement unit and generating a set of biomechanical signals; combining the set of performance features into the performance signature; generating at least a second performance signature from a set of participants; comparing the performance signature of the first participant to at least the second performance signature; and applying a result of the comparison to an interaction with at least one participant.

A digital video ramp assembly incorporates process-formed structural LED tiles with modular components that join in a system of scalable structural LED tiles forming a complete LED display structure with integrated LED embedded tiles with interlocking and inter-trans-positioning features sometimes requiring additional structural framing.