Exercise methods and apparatus

1. A variable motion exercise apparatus, comprising:

a) a frame designed to rest upon a floor surface;

b) a left crank and a right crank, wherein each said crank is mounted on a respective side of said frame and rotatable about a common crank axis;

c) a left rocker link and a right rocker link, wherein each said rocker link is mounted on a respective side of said frame and rotatable about a common pivot axis;

d) a left foot support linkage and a right foot support linkage, wherein each said foot support linkage is movably connected between a respective rocker link and a respective crank;

e) a left drawbar linkage and a right drawbar linkage, wherein said drawbar linkage is movably connected between a respective rocker link and a respective crank in such a manner that a foot supporting portion of each said foot supporting linkage is constrained to move through a generally elliptical path as a respective crank rotates, and each said drawbar linkage is selectively movable relative to a respective rocker link to alter a respective generally elliptical path;

f) wherein said drawbar linkage includes a first link and a second link which are pivotally connected to one another, and an opposite end of each said first link is rotatably connected to a respective crank and an opposite end of each said second link is pivotally connected to a respective rocker link; and

g) wherein each said rocker link includes a roller mounted on a respective roller shaft, and wherein said rollers are in engaging contact with a linear race formed in each of said second link.

2. The exercise apparatus of claim 1 , wherein said rollers are constrained to move through a reciprocal path defined by said linear race.

3. The exercise apparatus of claim 2 , wherein said reciprocal path of said rollers is selectively adjusted to alter a respective generally elliptical path.

4. The exercise apparatus of claim 2 , including a handle operatively connected to each of said second link wherein manipulation of said handle alters the reciprocal path of said rollers and said respective generally elliptical path.

5. The exercise apparatus of claim 2 , including an actuator operatively connected to a control console and each of said second link for altering the reciprocal path of said rollers.

6. The exercise apparatus of claim 5 , including sensor means operatively connected to said actuator, wherein said sensor means generate an output signal responsive to force exerted by a user on the handle bars of said apparatus, said output signal being transmitted to said actuator to alter the reciprocal path of said rollers.

7. The exercise apparatus of claim 6 , wherein said sensor means is a strain sensor mounted on said handle bars.

8. The exercise apparatus of claim 5 , including sensor means operatively connected to said actuator, wherein said sensor means generate an output signal responsive to force exerted by a user in a longitudinal direction relative to foot supports on the foot support linkage, said output signal being transmitted to said actuator to alter the reciprocal path of said rollers.