A rowing exercise machine, comprising: a base (1), a seat (2), a rotation disc (3), oar units (4), a damping mechanism (6) and a transmission mechanism (7). The base (1) has a stand (11) and a sliding rail (12) obliquely disposed. The seat (2) is slidably fitted on the sliding rail (12). The rotation disc (3) is rotatably mounted on the stand (11) through a fixed rotation shaft (31). Two oar units (4) are connected to two ends of the rotation shaft (31) respectively through one-way bearings (51) to drive the rotation disc (3) to rotate in one direction when the oar units (4) are rowed. The damping mechanism (6) is mounted on the stand (11). The transmission mechanism (7) is mounted on the stand (11) and connected between the rotation disc (3) and the damping mechanism (6), to drive a damping wheel (61) of the damping mechanism (6) to rotate when the rotation disc (3) is rotating.

The invention concerns a device (1) for allowing a user (25) to walk or run on the spot in an arbitrary direction and a method for controlling the device (9). The device (1) comprises a stationary central platform (9) surrounded by a convex polygon shaped deck (6) in level therewith, said deck (6) being divided into trapezoid shaped roller conveyors. Each conveyor has rollers in parallel with the trapezoid bases, the shorter one of these adjoining said platform and the longer one of these forming a side of said polygonal shape. The rollers of said conveyors are driven in order to move a user (25) stepping thereon back to said central platform (9). The rollers as such are continuous circular cylindrical, and beneath them there is a driving means for frictional driving engagement with the rollers from below. According to the method a marker (26) placed on top of the user (25) is monitored by means of video cameras (24) and the speed of the roller conveyors adjusted depending on the perceived marker size and position.

A device that supports a motion for restoring an inclination angle of a body to a reference direction is provided. A balance device comprises a sensor, at least one flywheel, and a controller. The sensor is configured to detect an inclination angle of the body with respect to the reference direction. The at least one flywheel is arranged on the balance device so that an axis of the flywheel is non-parallel to a yaw axis of the body when the balance device is attached to a user. The yaw axis of the body corresponds to a longitudinal direction of the body. In addition, the yaw axis coincides with the reference direction when the user stands erect. The controller is configured to change a rotation rate of the flywheel based on an inclination angle detected by the sensor.

A swing handle arrangement for an exercise equipment having a pair of drive rods driven by the pedal rods such that longitudinal drive gears fixed at the drive rods are cooperated with swing handles having the lateral drive gears for conducting a swing action. In this way, a waist-twisting movement of the upper body can be synchronically achieved when the operator holds the swing handles to take exercise at his feet of the lower body.

In an inertia load mechanism of a reciprocating exercise equipment (20; 60), a pendulum load mechanism is installed to an exercise link rod of said reciprocating exercise equipment (20; 60), such that the pendulum load mechanism forms an inertia link and gives an exercise resistance. If the moving link rod of the reciprocating exercise equipment (20; 60) is at a moment of changing its exercise direction, the speed of changing direction of the pendulum load mechanism will be slowed down by the gravitational force, so that an exerciser's muscle has sufficient response time for the change of the exercise direction to eliminate a possible sport injury.