Exercise wheelchair

1. An exercise wheelchair comprising:

a frame with two rear wheels and at least one front wheel;

a seat with a front portion and a rear portion, the seat for receiving buttocks of a user;

a link having a first end pivotally connected to the frame to define a first fixed hinge, and a second end pivotally connected to the front portion of the seat to define a first floating hinge;

a backrest having a top portion and a bottom portion, the backrest for receiving a torso of the user, the backrest being pivotally connected to the frame at a section of the backrest located between the top portion and the bottom portion of the backrest to define a second fixed hinge, the bottom portion of the backrest being pivotally connected to the rear portion of the seat to define a second floating hinge, a reclining motion of the backrest causing a force to be applied to the seat through the second floating hinge and the seat to move forward, the first floating hinge moving along a circular arc with respect to the first fixed hinge upon a forward motion of the seat, the seat, backrest, first and second fixed hinges, and first and second floating hinges allowing the user to perform trunk extension exercises upon performing at least one of a reclining motion of the torso against the backrest and a pushing forward of the buttocks against the seat, the user being able to move about with the exercise wheelchair pre-and post-trunk extension exercises, the link allowing the seat to translate above the frame, in a forward and backwards direction while maintaining the seat in a substantially horizontal orientation while the backrest correspondingly reclines and returns to an upright orientation; and

a resistance means attached to the frame at one end, and attached to at least one of the seat and the backrest at its other end, in order to provide a resistance during the trunk extension exercises.

2. The exercise wheelchair as claimed in claim 1 wherein the seat is positioned within the frame to place the combined center of gravity of the exercise wheelchair and the user forward of the contact point where the two main rear wheels rest on the ground to prevent the exercise wheelchair from tipping backwards.

3. The exercise wheelchair as claimed in claim 1 wherein the backrest comprises an extension below the second fixed hinge, the extension defining the bottom portion of the backrest.

4. The exercise wheelchair as claimed in claim 3 wherein the rear portion of the seat defines a notch for containing the second floating hinge and the extension comprised in the backrest is connected to the rear portion of the seat within said notch.

5. The exercise wheelchair as claimed in claim 1 wherein said resistance means is resilient.

6. The exercise wheelchair as claimed in claim 1 wherein said resistance means comprises damping means.

7. The exercise wheelchair as claimed in claim 6 wherein said damping means is adjustable, being provided with an adjustment means to control the degree of damping, thereby allowing a user to vary the amount of force required in order to recline the seat assembly.

8. The exercise wheelchair as claimed in claim 1 wherein the resistance means comprises one or more elastic bands that can be removably connected between the frame and the at least one of the seat and the backrest.

9. The exercise wheelchair as claimed in claim 1 , further comprising a footrest pivotally connected to the frame forward and below the front portion of the seat, said footrest being coupled through a footrest coupling to the seat, the user pushing on the footrest causing a force to be applied to the seat and the seat to move forward, the moving forward of the seat causing the backrest to recline.

10. The exercise wheelchair as claimed in claim 9 further comprising resilient means to bias the footrest upwardly towards the seat section.

11. The exercise wheelchair as claimed in claim 10 wherein the footrest coupling constitutes the resilient means.

12. The exercise wheelchair as claimed in claim 9 wherein the footrest coupling comprises damping means.

13. The exercise wheelchair as claimed in claim 9 wherein the footrest is divided into two parts each part for receiving a foot of the user.

14. The exercise wheelchair as claimed in claim 9 , further comprising a latch for locking the backrest to prevent rotation of the backrest about the second fixed hinge.

15. An exercise wheelchair comprising:

a) a frame having two main rear wheels and at least one front wheel;

b) a seating assembly comprising a seat section having front and rearward end portions and a back section, which sections are each respectively connected to the frame and to each other, the seat section for receiving buttocks of a user, the back section for receiving a torso of the user;

c) the back section having a lower end and an upper portion, the back section being connected at a point of the back section located between the lower end and the upper portion, to the frame through a fixed hinge joint about which the back section can rotate rearwardly permitting the back section to recline while supported by the frame, the lower end of the back section extending below the fixed hinge joint, the rearward end portion of the seat section being pivotally connected to the lower end of the back section through a rear pivoting connection to allow the back and seat sections to change their relative orientation to each other, while remaining connected, and

d) a footrest pivotally connected to the frame forward and below the front portion of the seat section, the footrest for receiving feet of the user, the footrest being coupled through a footrest coupling to the seat section whereby, upon forward pivoting of the footrest, a force is transmitted through the footrest coupling from the footrest to the seat section to draw the seat section in a forward direction.

16. The exercise wheelchair as in claim 15 comprising resilient means to bias the footrest upwardly towards the seat section.

17. The exercise wheelchair as claimed in claim 16 wherein the footrest coupling is the resilient means.