Portable and stowable vertical knee raise exercise apparatus and system

1. A vertical knee raise machine comprising:

a. a tripod base movable between a deployed support position and a folded storage position;

b. a backrest with a left armrest connected at a first end to said backrest and a right armrest connected at a first end to said backrest;

c. a support: shaft with a first end connected to said tripod base and a second end connected to said backrest;

d. wherein a plane formed by said backrest is reclined at a preset oblique angle relative to said support shaft; and

e. wherein said armrests are retractable from a deployed position to a folded position to thereby put said vertical knee raise machine in a compact storage configuration for storage when said armrests are in said retracted position and said tripod base is in said folded storage position.

2. The vertical knee raise machine of claim 1 wherein said preset oblique angle between said backrest and said shall is 10°.

3. The vertical knee raise machine of claim 1 wherein said preset oblique angle between said backrest and said shall can vary from 5° to 15°.

4. The vertical knee raise machine of claim 1 wherein a length of said shaft connecting said tripod base to said backrest can be adjusted to vary the distance between said tripod base and said backrest, to thereby allow persons of different heights to use said vertical knee raise machine.

5. The vertical knee raise machine of claim 1 wherein when said armrests are in said deployed position, a right angle is formed between a plane of said armrests and said plane of said backrest.

6. The vertical knee raise machine of claim 1 wherein when said right and left armrests in said retracted position, said armrests form a plane congruent with said support shaft.

7. The vertical knee raise machine of claim 1 wherein when said tripod base is deployed in said support position, one leg of said tripod base forms a plane perpendicular to a plane formed by said back rest and projects in the same direction as said armrests.

8. The vertical knee raise machine of claim 1 wherein said machine is made of a material selected from the group consisting of A36 steel and A106 steel.

9. The vertical, knee raise machine of claim 1 wherein said left armrest has a hand grip at a second end of said left armrest, and said right armrest has a hand grip at a second end of said right armrest.

10. The vertical knee raise machine of claim 1 wherein said support shaft is oriented in a vertical direction.

11. The vertical knee raise machine of claim 1 wherein said second end of said support shaft which connects to said back rest is bent at said preset oblique angle to thereby position said backrest at said present oblique angle.

12. A vertical knee raise machine comprising:

a. a tripod base movable between a deployed support position and a folded storage position;

b. a backrest with a left armrest connected at a first end to said backrest with a hand grip at a second end of said left armrest and a right armrest connected at a first end to said backrest with a hand grip at a second end of said right armrest;

c. a support shaft with a first end connected to said tripod base and a second end connected to said backrest;

d. wherein a plane formed by said backrest is reclined at a preset oblique relative angle to said support shaft;

e. wherein said armrests are retractable from a deployed position to a folded position to thereby put said vertical knee raise machine in a compact storage configuration for storage when said armrests are in said retracted position and said tripod base is in said folded storage position;

f. wherein said preset oblique angle between said backrest and said shaft is 10′;

g. wherein when said armrests are in said deployed position, a right angle is formed between a plane of said armrests and said plane of said backrest; and

h. wherein when in the deployed position, a leg of said tripod base projects in the same direction as the legs of a person using said vertical knee raise machine.

13. A vertical knee raise exercise method comprising:

a. providing an apparatus having a foldable tripod base permitting storage in a substantially flat configuration and permitting a working configuration adjustable at a desired height for elbow or forearm supports;

b. adjusting the apparatus for use by a user, performing vertical knee raise exercises using the apparatus; and

c. adjusting the apparatus for storage in the substantially flat configuration.