Abstract: An exercise device includes pedals, a belt and a hydro-kinetic brake. A user applies muscular force to the pedals and the pedal belt transfers the motion of the pedals to a flywheel shaft of the fluid brake. The pedals may be configured to accept force from a hand, foot, arm, leg and/or neck of the user. The amount of work performed by the user is derived by measuring the relative rotational speeds of two radial-blade impellers of the fluid brake. The wattage exhibited by the fluid brake during the exercise session may be recorded and associated with an identified user, whereby records of the exercise performance of an individual may be updated.

Abstract: An exercise device includes pedals, a belt and a hydro-kinetic brake. A user applies muscular force to the pedals and the pedal belt transfers the motion of the pedals to a flywheel shaft of the fluid brake. The pedals may be configured to accept force from a hand, foot, arm, leg and/or neck of the user. The amount of work performed by the user is derived by measuring the relative rotational speeds of two radial-blade impellers of the fluid brake. The wattage exhibited by the fluid brake during the exercise session may be recorded and associated with an identified user, whereby records of the exercise performance of an individual may be updated.

Abstract: An exercise device comprising a variable speed rotary driving device, an adjustable speed control for the rotary driving device, an exercise link offering resistance to motion of the user, and a hydraulic coupling connecting the variable speed rotary driving device to a torque multiplier. The exercise device operates such that torque is transmitted to the exercise link to impart resistance to motion of the link, and the resistance to motion is variable and also a consistent function of the speed and direction of the link and of the variable speed rotary driving device.