Horse-riding simulating physical fitness device

A horse-riding simulating physical fitness device, comprising:

• a bottom rack, which comprises a base comprising a front support and a rear support mounted thereon, the rear support comprising two side boards respectively and rotatably coupled to two crank arms that extend in the same direction, the two crank arms respectively comprising two rocker arms fixed thereto and located inside the two side boards of the rear support and extending in the same direction, wherein one of the crank arms is provided with a drive wheel outside the rear support for simultaneous rotation in unison therewith, the base comprising a wheel support mounted thereto, the wheel support rotatably supporting a flywheel, the drive wheel driving the flywheel to simultaneously rotate in unison therewith through a transmission assembly, the front support having an upper end rotatably coupled to a connection link;
• and
• a movable frame, which comprises a connection bar having opposite ends respectively coupled to the rocker arms of the bottom rack and the connection link, the connection bar comprising a seat bar that supports a seat cushion, the movable frame comprising a head bar, which carries a handlebar.