Abstract: A knee extension treatment apparatus for applying a downward force to an upper surface of a user's leg while the leg is supported by the knee extension treatment apparatus, for facilitating the straightening of the leg when bent at the knee, according to one embodiment of the present invention comprises a base frame assembly, an ankle support connected to the base frame assembly, first and second strap assemblies secured to the base frame assembly, each strap assembly being secured at one end and constructed and arranged to lay over the upper surface of the user's leg, a corresponding opposite end of each strap assembly being movable by the user whereby pulling each corresponding opposite end creates a corresponding downward force on the upper surface of the user's leg.