US Patent 12102870 Rowing exercise system

A lower limb exercise system exercise system includes a chair including a seat and a rowing exercise device configured to enable a user to perform rowing exercise while the user remains sitting on the seat. The seat is configured to at least roll, pitch, or yaw. The seat can instead be configured to at least roll and yaw. The rolling of the seat indicates that the seat descends as the seat moves away to the right or the left from a reference position.