A stationary exercise device with a driving assembly with a driving wheel rotating around a driving axle, a first and a second crank each connected to the driving wheel and two pedals, each connected to one of the cranks, a flywheel connected to the driving assembly by at least one gear mechanism, a brake assembly for applying a braking force to the flywheel, at least one measuring device for measuring the position of the first and second crank is provided. A detection device detects several time intervals, in each of which the flywheel is displaced a predetermined angle, the detection device further detects time differences between at least two of the time intervals. A control device determines, through dependence of the time differences between at least two of the time intervals, a torque at the driving wheel or a value dependent on the torque at the driving wheel.

A motor-less leg-powered curved treadmill produced that allows people to walk, jog, run, and sprint without making any adjustments to the treadmill other than shifting the user's center of gravity forward and backwards. A closed loop treadmill belt running between front and rear pulley rollers is formed with a low friction running surface of transverse aluminum, wooden, plastic, rubber or carbon fiber slats attached to each other in a resilient fashion. An essential feature of treadmill is the concave shape of the upper portion of the belt running surface, the treadmill configurations ensure that this shape is maintained during actual use. These configurations prevent the concave upper running surface portion from being pulled taut into a flat shape between the front and rear pulley rollers. The slats of the treadmill each have an end view crossectional I-beam shape, for strength and stability of the slat positioned upon the treadmill belt.

A resistance exercise system having, in certain embodiments, a DC power supply system, a DC motor connected to the DC power supply system, a drive section connected to a drive element, a resistance delivery element connected to the drive element, and an extractable exercise resistance delivery section, a predetermined variable resistance section intermediate the DC power supply system and DC motor, an electrical condition sensor, and a variable resistance section control in communication with the electrical condition sensor and the predetermined variable resistance section. In some embodiments, the resistance exercise system includes a computing facility providing the ability to configure the exercise system to provide predetermined static or variable exercise resistance during exercise, and for example, during a positive or negative exercise stroke. Some embodiments allow users to create and, if desired, display varying and complex resistance exercise routines with or without use of resistance weights.

Provided is a virtual road surface implementation-type bicycle simulator. The virtual road surface implementation-type bicycle simulator according to the present disclosure includes a rear wheel support portion that supports a rear wheel of a mounted bicycle and rotates together with rotation of the rear wheel; and a road surface implementation portion including a plurality of uneven portions that perform a protrusion operation at various heights on an outer peripheral surface of the rear wheel support portion in contact with the rear wheel, thereby providing a rider riding the bicycle with various road surface states which are virtually set.

A motor-less leg-powered curved treadmill produced that allows people to walk, jog, run, and sprint without making any adjustments to the treadmill other than shifting the user's center of gravity forward and backwards. A closed loop treadmill belt running between front and rear pulley rollers is formed with a low friction running surface of transverse aluminum, wooden, plastic, rubber or carbon fiber slats attached to each other in a resilient fashion. Since an essential feature of treadmill is the concave shape of the running surface of belt in its respective upper portion, the treadmill configurations insure that this shape is maintained during actual use. These configurations prevent the concave upper running surface portion from being pulled taut into a flat shape between the front and rear pulley rollers.

A portable exercise device provided includes: a base disc, two pulley assemblies, a support plate, and a fan wheel assembly. A support plate is disposed on the base disc, the two pulley assemblies are provided on the base disc, and the fan wheel assembly is provided on the support plate, so that the fan wheel assembly and the two pulley assemblies are vertically arranged on top of each other, thereby reducing the overall volume. More preferably, because the volume is reduced, the user can arbitrarily move and hang the portable exercise device at the desired position, and because the portable exercise device of the invention can be hung at different positions, which allows the user to train different muscles according to the different positions.

A treadmill includes a frame; a running belt configured to move relative the frame; and a motor coupled to the running belt. The motor is operable in a plurality of user controlled operating modes. In a first operating mode, the force of rotation of the running belt is provided by a user of the treadmill. In a second operating mode, the motor applies a desired braking force to resist rotation of the running belt. In a third operating mode, the motor applies a torque output to the running belt based on a force exerted on the running belt by a user of the treadmill.

An exercise machine is for performing a striding exercise motion. The exercise machine has frame; first and second pedal members; first and second foot pads on the first and second pedal members, respectively, each of the first and second foot pads being configured to move in an elliptical path during the striding exercise motion; first and second rocker arms pivotally coupled to the frame; and first and second adjustment devices configured to actively adjust and set a position of the first and second pedal members relative to the first and second rocker arms, respectively, which thereby changes a shape of the elliptical path.

Embodiments disclosed herein provide an exercise system that facilitates a varying load. During operation, the system produces a load-control pattern using a control module, and varies a load using a load-varying mechanism based on the load-control pattern, thereby facilitating varying-load during exercise for effective muscle stimulation.

A treadmill may include a deck, a first pulley incorporated into the deck, a second pulley incorporated into the deck, a tread belt surrounding the first pulley and the second pulley, a motor in mechanical communication with at least one of the first pulley and the second pulley to move the tread belt in a first direction, and a runaway mitigation mechanism in at least indirect mechanical communication with the motor. The runaway mitigation mechanism at least mitigates a motor runaway condition.