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A person lies supine on a floor surface with her knees bent and her feet resting on a foot supporting portion of an exercise assembly. The person uses her hands to grasp respective left and right handles on the exercise assembly proximate her left and right hips. The person positions her abdomen ben

A person lies supine on a floor surface with her knees bent and her feet resting on a foot supporting portion of an exercise assembly. The person uses her hands to grasp respective left and right handles on the exercise assembly proximate her left and right hips. The person positions her abdomen beneath a strap secured in series with at least one resistance device. The person moves her pelvis off the support surface subject to resistance from the resistance devices. Parts of the assembly may be used apart from the overall assembly to perform other sorts of exercises.

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1. An exercise assembly for a person, comprising: a frame configured to rest in a stable position on an underlying floor surface, wherein the frame includes a foot supporting surface sized and configured to accommodate a person's left and right feet when the person is lying supine on the floor surfa

1. An exercise assembly for a person, comprising: a frame configured to rest in a stable position on an underlying floor surface, wherein the frame includes a foot supporting surface sized and configured to accommodate a person's left and right feet when the person is lying supine on the floor surface with her knees bent;a left handle and a right handle, wherein each said handle is mounted in a respective fixed position on the frame to define a respective hand-hold within reach of a person's left and right hands, respectively, when the person is resting her feet on the foot supporting surface while lying supine on the floor surface with her knees bent;a left resistance device and a right resistance device, wherein each said resistance device is mounted on the frame; anda strap configured to overlie a person's lower abdomen when the person is resting her left and right feet on the foot supporting surface while lying supine on the floor surface with her knees bent, wherein the strap has a left end connected to the left resistance device and a right end connected to the right resistance device. 2. The exercise assembly of claim 1, wherein the left handle the left resistance device are mounted on a left end of the frame, and the right handle and the right resistance device are mounted on an opposite, right end of the frame. 3. The exercise assembly of claim 2, wherein the frame includes a base member and at least one foot support removably connected to the base member, and the at least one foot support defines the foot supporting surface. 4. The exercise assembly of claim 3, wherein the base member is configured and arranged to occupy a first orientation relative to the floor surface when arranged for use together with the at least one foot support, and the base member is configured and arranged to occupy a discrete, second orientation relative to the floor surface when arranged for use without the at least one foot support. 5. The exercise assembly of claim 1, wherein left and right toe cups are mounted on the frame to receive the person's left and right feet, respectively. 6. The exercise assembly of claim 1, wherein each said handle is selectively removable from the frame to accommodate performance of an alternative exercise. 7. The exercise assembly of claim 1, wherein each said handle overlies a respective said resistance device when the foot supporting surface is parallel to the floor surface. 8. The exercise assembly of claim 1, wherein each said handle extends vertically upward and then horizontally when the person is resting her feet on the foot supporting surface while lying supine on the floor surface with her knees bent and her hands on respective said handles. 9. The exercise assembly of claim 1, wherein the handles define an uppermost height of the exercise assembly when the exercise assembly is sitting idle and ready for use. 10. The exercise assembly of claim 1, wherein a left flexible member extends from the left end of the strap to a guide on the left resistance device, and a right flexible member extends from the right end of the strap to a guide on the right resistance device, and each said guide is disposed within six inches of the support surface when the person is resting her feet on the foot supporting surface while lying supine on the floor surface with her knees bent. 11. The exercise assembly of claim 1, wherein each said resistance device is selectively removable from the frame. 12. The exercise assembly of claim 1, wherein the foot supporting surface is a continuous platform sized and configured to support both said feet in a range of locations. 13. A method of performing exercise using an exercise assembly, comprising the steps of: providing an exercise assembly;lying supine on a floor surface with one's knees bent and one's feet resting on a foot supporting portion of the exercise assembly;using one's left and right hands to grasp respective left and right handles disposed on respective left and right sides of the exercise assembly proximate one's left and right hips;positioning one's abdomen beneath a strap secured in series with at least one resistance device; andmoving one's pelvis off the support surface subject to resistance from said at least one resistance device. 14. The method of claim 13, further comprising the step of re-positioning at least one of the feet along the foot supporting portion and repeating the moving step. 15. The method of claim 13, wherein the positioning step involves connecting a left end of the strap to a flexible member emanating from a left resistance device disposed on a left side of the exercise assembly proximate one's left hip, and connecting an opposite, right end of the strap to a flexible member emanating from a right resistance device disposed on a right side of the exercise assembly proximate one's right hip. 16. The method of claim 13, comprising the alternative steps of removing each said resistance device from the exercise assembly; securing the left resistance device in one's left palm; securing the right resistance device in one's right palm; securing the left flexible member to the right resistance device; securing the right flexible member to the left resistance device; and performing an arm exercise subject to resistance from each said resistance device. 17. An exercise assembly for a person, comprising: a frame configured to rest in a stable position on an underlying floor surface, wherein the frame includes a foot supporting surface sized and configured to accommodate a person's left and right feet when the person is lying supine on the floor surface with her knees bent;a left handle and a right handle, wherein each said handle is mounted on the frame in a generally fixed orientation during exercise and within reach of a person's left and right hands, respectively, when the person is resting her feet on the foot supporting surface while lying supine on the floor surface with her knees bent; anda strap configured to overlie a person's lower abdomen when the person is resting her left and right feet on the foot supporting surface while lying supine on the floor surface with her knees bent, wherein the strap has a left end connected to a left resistance cord that extends from a left side of the frame and a right end connected to a right resistance cord that extends from a right side of the frame, and the strap is many times wider than each said resistance cord. 18. The exercise assembly of claim 17, wherein the left resistance cord emanates from a left resistance device releasably mounted on a left side of the frame, and the right resistance cord emanates from a right resistance device releasably mounted on a right side of the frame. 19. The exercise assembly of claim 17, wherein the foot supporting surface is part of a continuous platform sized and configured to support both said feet in a range of locations. 20. The exercise assembly of claim 17, wherein each said handle slides into a respective tube on the frame. 21. The exercise assembly of claim 17, wherein each said handle includes a first portion that is connected to the frame and a second portion that is rigidly connected to the first portion, and each said first portion extends perpendicular to a respective said second portion, and a respective hand grip is disposed on each said second portion. 22. The exercise assembly of claim 17, wherein each said handle is selectively removable from the frame to accommodate an alternative exercise.