motion in for example an ankle this is referred to as providing u201c continuous passive motion u201d the device includes a hard shell boot 810 within which the lower leg ankle and foot of a patient is inserted two air bladders 824 u 824 l although additional bladders could be used are included within the boot one air bladder is located above the foot proximate the toe area whereas the other air bladder is located beneath the sole of the foot proximate the toe area the u201c upper u201d bladder 824 u is separate from the u201c lower u201d bladder 824 l and the upper and lower bladders can be inflated and deflated separately in order to provide an up and down motion of the foot translating into an up and down motion of the ankle at least two types of flexion are intended to be provided under the present invention these two types of flexion are plantarflexion and the other type is dorsiflexion in an alternate embodiment of the present invention two hinged flaps are also used within the boot cavity one atop the foot and below the upper bladder and the other below the foot and above the lower bladder these two flaps correspond to the two bladders such that inflation of the lower bladder pushes upwardly on the lower pivoting flap causing upper flexion.