Moment arm weight resistance mechanism and weight training machines utilizing the same

1. A weight training machine comprising a frame and a moment arm weight resistance means, the moment arm weight resistance means comprising:

a) a cantilevered moment arm pivotally attached to the frame at a pivot point;

b) an adjustable weight attached to the moment arm;

c) a weight adjusting drive for adjusting the adjustable weight along the moment arm; and

d) an actuating means operatively connected to the moment arm weight resistance means at the pivot point, wherein moving the actuating means actuates the moment arm weight resistance means,

wherein movement of the adjustable weight along the moment arm creates a moment about the pivot point,

wherein the degree of weight resistance can be controlled by a user,

wherein the moment arm weight resistance means is variable for providing varying weight resistance and can be varied by a user during an exercise regimen, and

wherein the adjustable weight and the weight adjusting drive are supported on the moment arm and the weight adjusting drive is operatively attached to the adjustable weight.

2. The weight training machine as claimed in claim 1 , wherein the actuating means is movable between a first at rest position and a second fully extended position and can be maintained at any position between the first at rest position and the second fully extended position.

3. The weight training machine as claimed in claim 1 , wherein the weight adjusting drive is selected from the group consisting of motors, pneumatic cylinders, hydraulic cylinders, and force generating devices.

4. The weight training machine as claimed in claim 1 , wherein at least a portion of the moment arm weight resistance means is pivotable about the pivot point.