ALTERNATIVE DRIVING DEVICE AND SITTING-TYPE EXERCISE MACHINE HAVING THE ALTERNATE DRIVING DEVICE

摘要

A sitting type exercise machine has a frame, a flywheel, and an alternative driving device. The alternative driving device includes a base two driving units, and two driven units. The driving units and two driven units are provided on the base for rotation. A space is left between the driving units to let the driving units move independently. Therefore, the driving units respectively drive the driven units to move in the same direction. The frame is provided with a seat to let the user do exercise in a sitting posture which may reduce the loading on the knees during exercise.