20080207407 | Exercise treadmill for additionally vibrating a user running or walking on a tread belt - In one embodiment, an exercise treadmill includes a tread belt for permitting a user to run or walk thereon, a motor, a wheel and belt assembly for operatively connecting one end of a motor shaft to the tread belt, a sensor proximate the shaft, a controller, and a control panel. The sensor senses a speed change of the shaft in response to an impact on the moving tread belt. In response to the sensing, the controller instructs the motor to increase shaft speed in substantially real time. A user can press a vibration key on the control panel to perform at least one of changing amplitude of a sinusoid and adding same to the shaft speed, changing frequency of the sinusoid and adding same to the shaft speed, and changing the shaft speed via the controller and the motor, thereby vibrating the tread belt. | 08-28-2008 |