A weightlifting machine that includes a pulley system and a cable system that attaches to a weight rack frame to allow a user to perform a weightlifting exercise. The pulley system may include a first pulley and a second pulley where the cable system engages each pulley. The cable system may have a first end connected to a grip attachment and a second end attached to a resistance element. The resistance element may include a resistance band, a weight support that holds a weight plate, a set of weight plates, or other type of resistance element. The cable system may extend from the pulley through an opening located one of the frame members that form the frame.

A reduced friction massage and exercise device, which includes a base frame and at least one anchoring arrangement for anchoring a first body part of a user. A reduced friction surface is mounted onto the base frame, and includes a plurality of ball transfer units arranged such that adjacent ball transfer units engage one another. The device further includes at least one cable column including a weight stack. Each of the motion transfer balls is adapted for omnidirectional rotation relative to a corresponding housing element and independently of other the motion transfer balls. The reduced friction surface is adapted to have a second body part of the user placed thereon during performing of a physical activity applying force to the second body part, while reducing friction between the second body part and the surface.

A weight resistance exercise machine having cable and pulley linkage assemblies attached to a single weight stack. Each cable and pulley linkage assembly, which is independent of the other(s), can be used by one arm or leg during bilateral exercise training (that is, training in which both limbs of a pair are used to simultaneously to lift a weight). A tilt platform and biofeedback assembly display and measure in real-time how much each limb of a pair is contributing to such lifting effort.

A workout system is provided that includes a piece of furniture having at least a backrest and a seat. A chair workout machine is provided coupled to the piece of furniture. The chair workout machine includes a support frame coupled to at least one structure of the piece of furniture. At least one rotatable arm is rotatably attached to the support frame. One or more resistance elements are coupled to the at least one rotatable arm, where the resistance elements arranged to provide resistance to movement by at least one body part of a user.

The present invention relates to wobbly balls and exercise coil springs. A wobbly ball may include a non-spherical rigid, hollow ball body formed of two halves, each half comprising an upper ladle or a lower ladle which are welded together along a central seam therebetween, and defining a hollow cavity therein. A spherical inner ball is captured within the hollow cavity of the hollow ball body of the wobbly ball, so that upon movement of the wobbly ball, the inner ball rolls within the cavity, producing a wobbly, eccentric motion. The exercise coil spring may be formed of a single coiled wire, the coiled spring including a central portion where the coiled wire is coiled to a first diameter that is constant. Opposed flared ends are provided ends of the central portion where the coiled wire is progressively coiled from the first diameter to a second diameter, which is greater.

A weight system having at least one weight stack moveable in a vertical direction on a lift rod, and a bearing block for housing a linear bearing. The invention further includes a method and apparatus for aligning the linear bearing.

A cam mechanism may include a cam assembly rotatably mounted to an axis shaft and having a profile arc adapted for receiving a belt or cable, a belt adjustment lever pivotally mounted to the cam assembly and having a control bearing, and a cam range slot plate rigidly mounted to the axis shaft and defining a slot in sliding communication with the control bearing of the belt adjustment lever, wherein the belt adjustment lever is connected to one end of a belt or cable, and the opposite end of the belt or cable is connected to a moveable weight stack, and wherein the cam assembly is rotatable relative to the cam range slot plate.

A training device (1) for training abdominal muscles comprising an arm (3) and a handle (2) for holding with two hands, the handle (2) being attached to or forming an integral part of the arm (3). There are disclosed different embodiments allowing a user to hold the handle (2) and to make arch-like training movements in order to train control of abdominal muscle activity.

The gluteal muscles are exercised using a vertical lift strategy. It is much improved over common buttock exercise methods of sitting, laying, squatting or pushing weight horizontally. The (GM) power lift apparatus is operated in a standing position. Using commercial exercise design methods, the GM power lift apparatus is designed around the lifting of a variable weight plate stack. Three pullies redirect the pull force of the weight plate under the operator's foot as lift on the gluteus maximus muscle group. The new standing design allows improved muscle agitation by making the gluteus maximus muscle group lift a vertical payload, the maximum angle of force. During the power lift stroke, the foot, leg and back muscles are vertically synchronized to horizontal stretched forearms providing greater strength management.

A force measurement device has a motion dampening device having at least two ends. A first end is releasably engaged to a base frame and a second end is releasably engaged to a moveable member. A load cell is in communication with the motion dampening device. The load cell measures a force imparted by a user and the load cell registers the force to a display which depicts the registered force exerted by the user. A method for measuring the force a user imparts onto an exercise apparatus comprises the user imparting force onto a moveable member. The motion dampening device imparts a force substantially opposite to the user force and a load cell measures the force exerted by the user. The force is transmitted to a display wherein the display depicts the registered force imparted by the user.