Abstract: An exercise machine includes a frame, a motor/generator mounted on the frame and switched between a motor mode and a generator mode, a control unit connected with the motor/generator for activating the motor/generator in the motor mode, and two cranks connected with the motor/generator, wherein the cranks are driven via the motor/generator in the motor mode and drive the motor/generator in the generator mode. In an aspect, the exercise machine includes two pedals each attached to one of the cranks. In another aspect, the exercise machine includes two cranes pivotally mounted on the frame and two skis each including an end pivotally connected with one of the cranes and an opposite end pivotally connected with one of the cranks.

Abstract: An exercise machine includes a frame, a motor/generator mounted on the frame and switched between a motor mode and a generator mode, a control unit connected with the motor/generator for activating the motor/generator in the motor mode, and two cranks connected with the motor/generator, wherein the cranks are driven via the motor/generator in the motor mode and drive the motor/generator in the generator mode. In an aspect, the exercise machine includes two pedals each attached to one of the cranks. In another aspect, the exercise machine includes two cranes pivotally mounted on the frame and two skis each including an end pivotally connected with one of the cranes and an opposite end pivotally connected with one of the cranks.

Abstract: An exercise machine includes a frame, a motor/generator and an instrument. The motor/generator is mounted on the frame and switched between a motor mode and a generator mode. The instrument includes a casing, a display, a control panel and an integrated circuit module. The casing is mounted on the frame. The display is mounted on the casing. The control panel is mounted on the casing for enabling a user to enter data and at least one command for switching the motor/generator between the modes. An integrated circuit module is received in the casing (10) and electrically connected with the display, the control panel and the motor/generator.