An exercise device for strengthening muscles is disclosed, having a continuous belt system that allows a user to move the continuous belt using their feet to exercise muscles of the person while the person lies in front of the continuous belt with their back braced on a resting surface. Such an exercise device allows a user to exercise their gluteus and hamstring muscles while strengthening their pelvic stabilizers. The exercise device could also have a weight device that allows a user to rest a weight on their torso during the exercise to increase the difficulty and effectiveness of the exercise.