Inertial resistance exercise apparatus

1. An exercise apparatus comprising:

a) a frame;

b) left and right foot support members movably connected to said frame, said left and right foot support members reciprocally movable along an inclined vertical path;

c) a weight pack supported by each said left and right foot support members; and

d) wherein said left and right foot support members and said weight pack define an unsprung mass providing inertial resistance to linear acceleration.

2. The exercise apparatus of claim 1 wherein each said weight pack comprises a plurality of weight plates.

3. The exercise apparatus of claim 2 wherein removal of one or more of said plurality of weight plates decreases said unsprung mass and addition of a weight plate increases said unsprung mass.

4. The exercise apparatus of claim 1 wherein said frame includes left and right races, said left and right foot support members being linearly constrained to move along respective said left and right races.

5. The exercise apparatus of claim 4 including a pinion gear rotatably secured to said frame, each said left and right foot support members including a rigidly secured rack gear in operative engagement with said center pinion gear.

6. The exercise apparatus of claim 1 including a pair of inclined vertically extending guide assemblies spaced apart from one another fixedly secured to said frame.

7. The exercise apparatus of claim 6 wherein said left and right foot support members include linear bearings.

8. The exercise apparatus of claim 1 including left and right guide members fixedly secured to said frame.

9. The exercise apparatus of claim 1 wherein said frame includes a base and a stanchion fixedly secured to said base, said left and right foot support members pivotally connected to said stanchion.

10. The exercise apparatus of claim 1 including a pulley rotatably secured to said frame and a cable looped about said pulley having opposite distal ends fixedly secured to said left and right foot support members.

11. The exercise apparatus of claim 1 including a central bevel gear rotatably secured to said frame, a bevel gear fixedly secured to a forward end of each said left and right foot support members operatively engaged with said central bevel gear.

12. The exercise apparatus of claim 1 wherein said weight packs each comprise two or more separate weight packs supported by each said left and right foot support members.

13. The exercise apparatus of claim 1 wherein said left and right foot support members comprise left and right belt platforms dependently coupled by a rocker member pivotally secured to said frame.

14. The exercise apparatus of claim 1 wherein said frame includes a base and a stanchion fixedly secured to said base, said stanchion including a lower race portion and an upper race portion, said foot support members including lower rollers and upper rollers in rolling contact with respective said lower race portion and said upper race portion of said stanchion.

15. The exercise apparatus of claim 1 including a weight selector bar rigidly secured to said foot support members.

16. An exercise apparatus comprising:

a) a frame;

b) left and right foot support members movably connected to said frame, said left and right foot support members reciprocally movable along an inclined vertical path;

c) first and second weight packs supported by each said left and right foot support members; and

d) wherein said left and right foot support members and said first and second weight packs define an unsprung mass providing inertial resistance to linear acceleration.

17. The exercise apparatus of claim 16 further including a cable and pulley system dependently coupling said left and right foot support members.