Pilates reformer

1. An exercise machine comprising:

an elongated frame having a head end and a foot end;

a moveable carriage slidably coupled to the elongated frame and moveable between the head end and the foot end, the moveable carriage having a spring bracket coupled to an underside of the moveable carriage;

a spring support rod slidably coupled with the elongated frame and disposed adjacent the foot end of the elongated frame, and selectively positionable with reference to the foot end by a handle that extends to an area that is outside an area defined by the elongated frame;

at least one resistive member coupled at a first end with the spring support rod and at a second end with the spring bracket, and configured to bias the moveable carriage towards the foot end of the elongated frame; and

a first spring positioning rod slidably coupled to and movable within a first rail on the elongated frame and a second spring positioning rod slidably coupled to and movable within a second rail on an opposing side of the elongated frame, wherein the spring support rod is coupled to and extends between the first and second spring positioning rods.

2. The exercise machine of claim 1 , wherein the first rail is a tubular rail coupled to an interior surface of the elongated frame and configured to support the moveable carriage.

3. The exercise machine of claim 2 , wherein the tubular rail extends from the head end to the foot end and comprises an elongated opening disposed adjacent the foot end.

4. The exercise machine of claim 3 , wherein the elongated opening comprises a plurality of positioning notches.

5. The exercise machine of claim 4 , wherein the spring support rod is coupled to a pivotable lock plate at each end, each of the pivotable lock plates having a locking pin extending therefrom configured to engage with one of the positioning notches of the plurality of positioning notches.

6. The exercise machine of claim 5 , wherein the pivotable lock plates are coupled by a handle plate.

7. The exercise machine of claim 6 , wherein the handle is configured to move the locking pin between a first position engaging a first one of the positioning notches and a second position engaging a second one of the positioning notches.

8. The exercise machine of claim 4 , wherein the tubular rail is a square-tube rail.

9. The exercise machine of claim 1 , where the spring support rod further comprises a plurality of hooks, where each of the plurality of hooks is configured to couple with a first end of the at least one resistive member.

10. The exercise machine of claim 9 , wherein the spring bracket comprises a plurality of hooks, where each of the plurality of hooks is configured to couple with a second end of the at least one resistive member, and where the at least one resistive member biases the moveable carriage towards the foot end of the elongated frame.

11. The exercise machine of claim 1 , wherein the spring support rod is coupled to a ball bearing collar at each end, each of the ball bearing collars configured to slideably couple with and move along one of the first spring positioning rod and the second spring positioning rod.

12. The exercise machine of claim 1 , wherein the movable carriage is slidably coupled to the frame by wheel assemblies attached to the underside of the movable carriage.

13. The exercise machine of claim 1 , wherein the movable carriage further comprises an adjustable headrest.

14. The exercise machine of claim 1 , wherein the movable carriage further comprises a plurality of mounting brackets for at least one accessory.

15. The exercise machine of claim 1 , wherein the at least one resistive member is one of a helical tension spring, an elastic bands, or a combination thereof.

16. An exercise machine comprising:

an elongated frame having a head end and a foot end;

a moveable carriage slidably coupled to the elongated frame and moveable between the head end and the foot end, the moveable carriage having a spring bracket coupled to an underside of the moveable carriage;

a spring support rod slidably coupled with the elongated frame and disposed adjacent the foot end of the elongated frame, and selectively positionable with reference to the foot end by a handle that extends to an area that is outside an area defined by the elongated frame; and

at least one resistive member coupled at a first end with the spring support rod and at a second end with the spring bracket, and configured to bias the moveable carriage towards the foot end of the elongated frame,

wherein the spring support rod is coupled to a pivotable lock plate at each end, each of the pivotable lock plates having a locking pin extending therefrom configured to engage with a positioning notch, and wherein the pivotable locking plates are coupled by a handle plate.

17. The exercise machine of claim 16 , wherein the handle is configured to move the locking pin between a first position engaging a first one of a plurality of positioning notches and a second position engaging a second one of the plurality of positioning notches.

18. The exercise machine of claim 16 , wherein the movable carriage is slidably coupled to the frame by wheel assemblies attached to the underside of the movable carriage.

19. The exercise machine of claim 16 , wherein the movable carriage further comprises an adjustable headrest.

20. The exercise machine of claim 16 , wherein the movable carriage further comprises a plurality of mounting brackets for at least one accessory.