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.

An exercise device includes a base and an upright structure connected to the base. The upright structure includes a stationary portion connected to the base, a height adjustable portion connected to the stationary portion, and a linear actuator that moves the height adjustable portion in response to a command from a user.

A treadmill includes a platform where the platform includes a first side panel and a second side panel spaced apart at a distance from the first side panel, and a gap defined between the first side panel and the second side panel. The treadmill also includes a running deck contained within the platform and exposed within the gap, a first pulley connected to the running deck, a second pulley connected to the running deck opposite the first pulley, a tread belt surrounding the first pulley and the second pulley, a first post removably connected to the platform, a second post removably connected to the platform, and a first rail transversely connected to the first post and the second post.

Display on exercise device. In one embodiment, an exercise device includes a frame, a movable engagement surface connected to the frame and movable in the performance of an exercise, and a display located adjacent to or below at least a portion of the movable engagement surface relative to the ground.

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.

Disclosed are various approaches for determining the maximum oxygen consumption of a person, also known as maximum aerobic capacity or VO.sub.2 Max. A person is positioned on a treadmill. Attached to the person is a harness configured to apply a horizontal force to the person. A work rate for the person can be calculated based at least in part on the magnitude of the horizontal force applied by the harness and the velocity of the belt. The maximum oxygen consumption for the person can then be calculated based at least in part on the previously calculated work rate.

A sporting apparatus comprises a structure body, an endless belt, an electricity generating unit, a position sensing unit and a modulation unit for continuously outputting electricity as the sporting apparatus is continuously operated. The electricity generating unit transforms kinetic energy, which is transmitted from the endless belt, into electric power. The position sensing unit senses a position of a user on the endless belt so as to generate a sensing signal. The modulation unit includes a DC/AC inverter, a current sensing element, an inductor and a semiconductor switch with a controller. The current sensing element senses an armature current outputted from the electricity generating unit and outputs a signal to the controller. The controller controls the duty ratio of the semiconductor switch to control the armature current, so that the armature current is adjusted according to the sensing signal for controlling the rotation speed of the endless belt.

An exercise apparatus comprises a platform having a front roller, a rear roller and an endless belt mounted around the front roller and the rear roller for allowing a user to perform a first exercise type of a relatively lower resistance or a second exercise type of a relatively higher resistance. A front frame is mounted at a front side of the platform and has at least one holding portion adapted to be grasped by the user. A first control interface controls the first exercise type. The first exercise type is selected from a group consisting of walking, jogging, and running. A second control interface that controls the second exercise type. The second exercise type includes the user pushing the endless belt backwards against resistance while grasping the holding portion.

An exercise apparatus includes a resistance system which has a first rotating shaft, a second rotating shaft and a transmission mechanism mounted between the two rotating shafts, such that the two rotating shafts are rotated with respect to each other at a predetermined transmission ratio. Besides, a first resistance device is controlled to apply a first resistance against rotation of the first rotating shaft, and a second resistance device is controlled to apply a second resistance against rotation of the second rotating shaft. The first resistance device and the second resistance device can be controlled independently. When a user uses the exercise apparatus to perform exercise, a moving member is driven by movement of the user. When the moving member is moved, the two rotating shafts are driven to rotate simultaneously, namely the user has to overcome the rotational resistance of the two rotating shaft during exercise.

Gait analysis systems are provided with body support systems for user's self-adjustment of body weight force when ambulating with the body support systems. The gait analysis systems with the body support systems can be used with a treadmill or over a fixed surface for gait training and analysis with the ability to adjust the user's body weight force during the collection of gait data. Gait data for analysis is collected by an array of sensors mounted on the body support systems in various combinations for sensing gait movement, video imaging, heel strike and toe off states, video processing, feet pressure maps and electromyography.