Hydraulic damping device with adjustable resistance and a riding platform

A riding platform comprising a support frame, wherein the support frame is connected with the hydraulic damping device with adjustable resistance comprising a frame body, a shaft mechanism, a flywheel and a hydraulic damping mechanism, the shaft mechanism is arranged on the frame body, one end of the shaft mechanism is connected with the hydraulic damping mechanism and another end of the shaft mechanism is connected with the flywheel, the hydraulic damping mechanism comprises:

• a cavity;
• a rotating disc provided with blades, wherein the rotating disc is arranged in the cavity;
• and
• an adjusting disc movably connected inside the cavity to control a liquid level height in the cavity;
• wherein a recess is arranged on the adjusting disc,
• wherein the recess comprises at least one through hole,
• wherein an adjusting rod is arranged on the adjusting disc, and the adjusting rod extends to an outside of the cavity, and
• wherein an inner sleeve is arranged in the cavity.