An exercise machine has a main frame and a user support movably mounted relative to the main frame for movement between a start position and an end position during an exercise. At least one user engagement device is movably mounted relative to the main frame for engagement and actuation by a user during an exercise, and a connecting linkage translates movement of the user engagement device to movement of the user support. A lifting arm is movably mounted relative to the main frame and associated with at least one of the user support, user engagement device, and connecting linkage so as to move during an exercise. A load associated with the lifting arm provides exercise resistance.

A constant tension mechanism of a training machine is provided, including: a base, configured to be connected to a body of the training machine; an elastic member, abutted against the base; and a tension mechanism, including a movable member movably connected with the base and abutted against the elastic member, and at least one tension pulley rotatably disposed on the movable member and configured to urge a belt connected to the body; wherein relative to the base a direction in which the elastic member forces the movable member and a direction in which the at least one tension pulley moves point toward the same direction.

A four-bar linkage assembly exercise station that can be adjusted to various configurations to create various exercise motions having at least one adjustable operational pivot that is movable prior to operation of the machine and stationary during operation of the machine and at least one stationary adjustment pivot operatively connected to the at least one adjustable operational pivot. The stationary adjustment pivot is also operatively connected to an adjusting and latching component or assembly that can be engaged by a user prior to operation of the machine to adjust the four-bar linkage assembly exercise station to a desired configuration to create a unique exercise motion and secure the desired configuration of the adjustable four-bar linkage assembly.

A portable ski accessory that converts a portable resistance device into a ski-type exercise machine is presented. The ski accessory contains a hanger chassis, a mounting element, a track, a cord, a handle, and a connection element. The hanger chassis contains a cord input portion and a cord output portion. The cord input portion is positioned terminally opposite to the cord output portion along the hanger chassis. The mounting element is connected adjacent to the hanger chassis. The track is positioned within the hanger chassis. The track traverses from the cord input portion to the cord output portion. The cord traverses through the track. The handle is connected to the cord. The connection element is connected to the cord, opposite to the handle.

Compact inertial device for muscle training, consisting of a pulling body (1) and a drive rope (2). The pulling body (1) in turn comprises a rotating main shaft (4), a reel (8) mounted on the main shaft (4), an inertia element (6) linked solidly to one end of the main shaft (4) for accumulation of kinetic energy from the rotation of the main shaft (4), and a planetary gear (5), which in turn comprises a central gear mounted on the main shaft (4), for multiplication of the transmission speed from the main shaft (4) driven by the reel (8) to the inertia element (6). In its preferred embodiment, the spool (8) is a conical spool with a smaller diameter sector to which one end of the rope (2) is solidly attached.

Disclosed herein are robust disposable alternating tangential flow (ATF) housing and diaphragm pump units and associated methods of manufacturing, testing, wetting, and using the same.

An exercise machine is disclosed. The exercise machine comprises a pancake motor. The exercise machine comprises a torque controller coupled to the pancake motor. The exercise machine comprises a high resolution encoder coupled to the pancake motor.

The permanent magnet resistance simulation device includes: a base; a motor arranged on the base and having a torque output shaft, and having a torque data encoder and a rotational speed controller; a transmission shaft arranged on the base and coaxial with the torque output shaft, and is equipped with a motion data encoder; a pair of flywheels, coupled to the torque output shaft and the transmission shaft, and the pair of flywheels are coupled with a magnet and a magnetic surface; a rope reel arranged on the transmission shaft and is twined with a rope, and a one way clutch is arranged between the rope reel and the transmission shaft; a volute spring arranged on the transmission shaft; and a control system.

A bi-directional exercise machine has a work arm, first and second cams coupled to the work arm, a resistance mechanism, and a pulley assembly that couples the resistance mechanism to the work arm via the first and second cams so that movement of the work arm is resisted by the resistance mechanism according to first and second resistance profiles provided by the first and second cams, respectfully. A primary pulley cable has a first end coupled to the first cam and a second end coupled to the second cam. When the work arm is in a rest position, the ends of the primary pulley cable extend from cable tracks of the cams, respectively, at a tangent so that the resistance mechanism applies a resistance force on the work arm via the pulley assembly immediately upon movement of the work arm out of the rest position.

A weight lifting device including a housing having first frame having first vertical channel for accommodating first weight holding means, and second frame having second vertical channel for accommodating second weight holding means, wherein first vertical channel and second vertical channel are dimensioned so that first weight holding means and second weight holding means can move up and down, when in use, in first vertical channel and second vertical channel, respectively. The weight lifting device also includes a handle bar pivotably connectable to first weight holding means and to second weight holding means from first end of handle bar and second end of handle bar, respectively. The weight lifting device further includes at least one of: first holding bar, second holding bar, first pivotable arm, and second pivotable arm, arranged between pivotably connectable handle bar and first weight holding means and second weight holding means.