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Assemblies, systems, devices, and methods for attaching a pull up and cross pull up bars to a clamp assembly which is equally clamped to both sides of a door frame above a doorway, with or without additional straps and cords supporting a suspended bar for the performance of exercises; and stand-alon

Assemblies, systems, devices, and methods for attaching a pull up and cross pull up bars to a clamp assembly which is equally clamped to both sides of a door frame above a doorway, with or without additional straps and cords supporting a suspended bar for the performance of exercises; and stand-alone racks with straps and cords supporting a suspended bar used for the performance of exercises; and existing bars or structural members with straps and cords supporting a suspended bar used for the performance of exercises.

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1. A pull up exercise device for a door frame, comprising: a clamp assembly having a first clamp and a second clamp parallel to one another, wherein the first clamp and the second clamp are adapted to clamp to both sides of a door frame above a doorway, and equally distribute a load therefrom; anda

1. A pull up exercise device for a door frame, comprising: a clamp assembly having a first clamp and a second clamp parallel to one another, wherein the first clamp and the second clamp are adapted to clamp to both sides of a door frame above a doorway, and equally distribute a load therefrom; anda pull up bar suspended below the clamp assembly, the pull up bar includes a main pull up bar between and parallel to the first clamp and the second clamp and two cross pull up bars spaced apart from each other and being perpendicular to the main pull up bar; andtwo M shaped brackets, each M shaped bracket supporting an end of the main pull up bar from each of the cross pull up bars. 2. The pull up exercise device of claim 1, wherein the clamp assembly includes: vertical support members for attaching the first and second clamps to the cross pull up bars. 3. The pull up exercise device of claim 2, wherein the vertical support members each include plural fastening holes adjacent to upper ends of the vertical support members for adjusting a horizontal height location of the first and second clamps relative to the vertical support members. 4. The pull up exercise device of claim 3, wherein the cross pull up bars each include plural fastening holes adjacent each end of the cross pull up bars for adjusting space distance between the cross pull up bars for different doorway frame thicknesses. 5. A pull up exercise device for a door frame, comprising: a clamp assembly having a first clamp and a second clamp parallel to one another, wherein the first clamp and the second clamp are adapted to clamp to both sides of a door frame above a doorway, and equally distribute a load therefrom; anda pull up bar suspended below the clamp assembly, wherein the first clamp and the second clamp each include a horizontal ledge member adapted for sitting on top of door way trim on both sides of the door frame; andtwo elongated straps, each having an upper end and a lower end, with the upper ends being attached to end portions on one of the horizontal ledge members; anda suspension bar attached to the lower end of the elongated straps. 6. The pull up exercise device of claim 5, wherein the clamp assembly includes: storage hooks attached to a side of the clamp assembly for supporting the suspension bar in a storage position when the suspension bar is not being suspended from the straps. 7. The pull up exercise device of claim 5, further comprising: an elongated cord having ends attached to the lower ends of each of the elongated straps; anda hollow tube through the suspension bar for allowing the suspension bar to rotate and slide sideways relative to the elongated cord. 8. The pull up exercise device of claim 5, further comprising: cam buckles for each of the elongated straps for adjusting a length of each of the elongated straps. 9. The pull up exercise device of claim 5, further comprising: a cushion or cushions shaped to receive arms and legs attached about the suspension bar. 10. A pull up exercise device for a door frame, comprising: a clamp assembly having a first clamp and a second clamp parallel to one another, the first clamp includes a first top horizontal member and first vertical members coupled to opposing end portions of the first top horizontal member, and the second clamp includes a second top horizontal member and second vertical members coupled to opposing end portions of the second top horizontal member, the first top horizontal member being parallel to and spaced apart from the second top horizontal member and being in a same horizontal plane with one another, and the first vertical members being parallel to one another, and the second vertical members being parallel to and spaced apart from one another, and the first vertical members and the second vertical members being at a same elevation with one another, wherein the first clamp and the second clamp are adapted to clamp to both sides of a door frame above a doorway, and equally distribute a load therefrom; anda pull up bar suspended below the first top horizontal member and the second top horizontal member of the clamp assembly. 11. The pull up exercise device of claim 10, wherein the first clamp and the second clamp each include a horizontal ledge member adapted for sitting on top of door way trim on both sides of the door frame. 12. The pull up exercise device of claim 11, wherein the clamp assembly includes: two threaded rods for clamping together the first clamp and the second clamp. 13. The pull up exercise device of claim 10, wherein the pull up bar includes: a main pull up bar between and parallel to the first clamp and the second clamp; andtwo cross pull up bars spaced apart from each other and being perpendicular to the main pull up bar. 14. A pull up exercise system for a door frame, comprising: a clamp assembly having a first horizontal ledge clamp and a second horizontal ledge clamp parallel to one another, wherein the first horizontal ledge clamp and the second horizontal ledge clamp are adapted to clamp to both sides of a door frame above a trim of a doorway, and equally distribute a load therefrom;a first set of vertical support members each having an upper end attached to and extending below the first horizontal ledge clamp;a second set of vertical support members each having an upper end attached to and extending below the second horizontal ledge clamp; anda pull up assembly having a main pull up bar beneath and parallel to the first horizontal ledge clamp and the second horizontal ledge clamp, and cross pull up bars each perpendicular to the main pull up bar adjacent to and attached to both ends of the main pull up bar, wherein the pull up assembly is attached to lower ends of the first and second sets of vertical support members. 15. The pull up exercise system of claim 14, wherein the first and second sets of vertical support members each include a plurality of through-holes for adjusting height distance between the first and second horizontal ledge clamps and the cross pull up bars. 16. The pull up exercise system of claim 15, wherein the cross pull up bars each include a plurality of through-holes for adjusting space distance between the cross pull up bars for different doorway frame thicknesses. 17. The pull up exercise system of claim 14, further comprising: M shaped brackets for attaching the main pull up bar to each of the cross pull up bars. 18. The pull up exercise system of claim 14, further comprising: two threaded rods for clamping the first set of vertical support members to one another and the second set of vertical support members to one another.