An exercising device comprising an elastic cord forming a continuous loop whereon three movable rings are disposed for forming a triangular stretching device defining three adjustable loops. Two lower loops form stirrups to receive and hold each foot of the user in a side-by-side relationship and a loop at the apex can be adjusted to receive and exercise the neck or head, or be gripped by the hands. A variety of muscle-toning exercises for the back, neck, arms, stomach, thighs and legs can be performed, and the loop can take numerous shapes and arrangements adaptable for a wide variety of exercises.