Speed-torque calibration of the MAGTURBO and wheelchair aerobic fitness trainer

Calibration experiments were performed to establish regression equations that can be used to calculate power outputs for a commercially available magnetic eddy breaking device (Minoura MAGTURBO) and for the wheelchair aerobic fitness trainer (WAFT) which incorporates this turbo in its design. For both the turbo and the WAFT, there is a significant quadratic relationship between power and rotational velocity for each resistance setting. Of the seven turbo settings, four strata are seen in the relationship between speed and power. The WAFT with modified MAGTURBO offers independent manipulation of speed and resistance for each wheel. This flexibility makes the WAFT appropriate for graded exercise stress testing and conditioning of persons with lower limb disabilities who have widely varied exercise capacities