Abstract: The suspension system disclosed may be used to provide anti-gravity or pro-gravity affects to aid in exercise and rehabilitation. The system includes a frame assembly which supports an elastic cord. The elastic cord supports a portion of the weight of the user and exerts upward or downward pressure on the user to reduce or enhance the user's weight. The elastic is configured to equalize the forces on the system and permit free movement of the user while reducing or enhancing the user's weight. The system may be used by itself or with a number of different exercises and equipment.

Abstract: A mechanical advantage device includes a base, a beam pivotably connected to the base at a fulcrum between a first end of the beam and a second end of the beam, a seat at the first end of the beam, and a load at the second end of the beam. In some embodiments, the mechanical advantage device includes structure, such as a linkage, for effecting oscillation of the beam by shifting weight along the beam. The mechanical advantage device may be a single-person seesaw.