Abstract: A device consisting primarily of two hinged plates with a variable tensioning mechanism. Applied to the foot and lower leg the device provides a progressive stretch for planter fascia, Achilles tendon and gastrocnemius muscle. Enhancements, comprised of an adjustable toe support, adjustable arch support and foot strap enable maximization of stretch for various foot types and conditions. A method of setting tension levels allows for application of protocol and, in conjunction with the use of a system to measure angular displacement of the plates, provides a method of evaluating flexibility and flexibility gains of the plantar fascia/Achilles tendon system.