Jumping jack exercise machine

An exercise machine for low impact exercise of a person. The machine has a base and a support post extending from the rearward end of the base. Two leg members divergently extend generally downward from a first forward facing pivot point for pivoting about a first axis perpendicular to the support post. A planar foot support is on each leg member and extends forward from the support post. Two arm members divergently extend generally upward from a second forward facing pivot for pivoting about a second axis parallel to the first axis. A handle is on each arm member. The arm members are pivotally joined to the leg members and the second axis slides vertically in engagement with the support post.

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What is claimed is:

1. An exercise machine for low impact exercise of a person comprising:

a base;

a support post extending vertically upward from said base;

a pair of legs mounted to said post at a fixed pivot point and depending downward;

a pair of arms mounted to said post at a floating pivot located below said fixed pivot point, each of said arms extending upward and being pivotally connected to one of said legs; and

a foot support at a lower end of each of said legs for supporting a user's foot, wherein moving said foot supports away from and toward each other causes said floating pivot point to reciprocate up and down said post.

2. Said exercise machine of claim 1 wherein said base has a forward end and a rearward end and said support post extends vertically from said rearward end.

3. Said exercise machine of claim 1 further comprising a resistance device mounted to said post for providing resistance to said upward and downward movement of said floating pivot.

4. Said exercise machine of claim 3 wherein said resistance device comprises an electromagnetic force.

5. Said exercise machine of claim 1 wherein said foot support is generally planar and adapted to accept a human foot both in a first axis and in a second axis perpendicular to said first axis.

6. Said exercise machine of claim 1 further comprising handles pivotally mounted to an upper end of each of said arms for gripping by a user.

7. Said exercise machine of claim 6 wherein each of said handles telescopes relative to one of said arms.

8. Said exercise machine of claim 6 wherein each of said handles is rotatable relative to one of said arms.

9. Said exercise machine of claim 1 wherein said legs have upper portions that diverge from each other in a downward direction and lower portions that converge toward each other in a downward direction.

10. Said exercise machine of claim 1 wherein said arms diverge from each other in an upward direction.

11. Said exercise machine of claim 1 wherein said post has a vertical slot and said floating pivot is a pin that slides up and down said slot.

12. An exercise machine for low impact exercise of a person comprising:

a base;

a support post extending vertically upward from said base;

a pair of legs mounted to said post at a fixed pivot point and depending downward;

a pair of arms mounted to said post at a floating pivot located below said fixed pivot point, each of said arms extending upward and being pivotally connected to one of said legs;

a foot support at a lower end of each of said legs for supporting a user's foot, wherein moving said foot supports away from and toward each other causes said floating pivot point to reciprocate up and down said post;

a resistance device mounted to said post for providing resistance to said upward and downward movement of said floating pivot; and

a handle pivotally mounted to an upper end of each of said arms for gripping by said user.

13. Said exercise machine of claim 12 wherein said base has a forward end and a rearward end and said support post extends vertically from said rearward end.

14. Said exercise machine of claim 12 wherein said resistance device comprises an electromagnetic force.

15. Said exercise machine of claim 12 wherein said foot support is generally planar and adapted to accept a human foot both in a first axis and in a second axis perpendicular to said first axis.

16. Said exercise machine of claim 12 wherein each of said handles telescopes relative to one of said arms.

17. Said exercise machine of claim 12 wherein each of said handles is rotatable relative to each of said arms.

18. Said exercise machine of claim 12 wherein said legs have upper portions that diverge from each other in a downward direction and lower portions that converge toward each other in a downward direction.

19. Said exercise machine of claim 12 wherein said arms diverge from each other in an upward direction.

20. Said exercise machine of claim 12 wherein said post has a vertical slot and said floating pivot is a pin that slides up and down said slot.

21. A method of exercising comprising said steps of:

providing an exercise machine having;

a base;

a support post extending vertically upward from said base;

a pair of legs mounted to said post at a fixed pivot point and depending downward; a pair of arms mounted to said post at a floating pivot located below said fixed pivot point, each of said arms extending upward and being pivotally connected toone of said legs; and

a foot support at a lower end of each of said legs for supporting a user's foot, wherein moving said foot supports away from and toward each other causes said floating pivot point to reciprocate up and down said post;

standing on said foot supports with a foot on each foot support;

positioning a hand on each of said handles;

moving said feet and legs apart from each other in unison causing said foot supports and handles to move toward and apart from each other; and

resisting said movement of said foot supports and said arms with a resistance device mounted to said support post.

22. Said method of claim 21 wherein said step of standing on said foot supports further comprises said step of facing said post with said feet perpendicular to said plain of motion.

23. Said method of claim 21 wherein said step of standing on said foot supports further comprises said step of facing laterally relative to said post with said feet parallel to said plane of motion.