The invention comprises a versatile compact kit of cooperatively fitting components to be assembled into several geometries of devices capable of being used for the holistic flexion exercise of several muscle groups of the lower torso such as the Achilles tendon, Calf muscles, Hamstrings, Adductor and...http://www.google.co.uk/patents/US7841973?utm_source=gb-gplus-sharePatent US7841973 - Stretch pal exercise set
