1) standing on a platform in a vertical position with the buttocks of the person supported against a horizontal support member;

2) leaning backward so that the back of the person is angled over said horizontal support member;

3) returning to said vertical position; and

4) repeating steps 2 and 3;

5) wherein said method is performed on an abdominal muscle exercise device, comprising:

a) a platform having a bottom for resting on a support surface, a top for supporting a user, a front end, a back end, a first side, and a second side;

b) a first vertical support member having a top end and a bottom end, wherein said bottom end of said first vertical support member is secured adjacent to said back end of said platform and adjacent to said first side of said platform;

c) a second vertical support member having a top end and a bottom end, wherein said bottom end of said second vertical support member is secured adjacent to said back end of said platform and adjacent to said second side of said platform;

d) a horizontal support member attached at a first end to said top end of said first vertical support member and at a second end to said top end of said second vertical support member, wherein said horizontal support member is located at a height to engage the buttocks of the user in a standing position;

e) a first angled support member secured at an upper end to said first vertical support member, wherein a lower end of said first angled support member is designed to rest on the support surface; and

f) a second angled support member secured at an upper end to said second vertical support member, wherein a lower end of said second angled support member is designed to rest on the support surface.