bend the ankle for standing or walking purposes the buoyancy of the ankle foot device 102 lifts the foot to the surface of the water 99 and reinforces the horizontal positioning resulting from the knee device 101 the device 103 for the elbow joint shown in fig4 is constructed to allow for more flexibility than the other joints since the elbow must go through a range of motion from an extended position to a flexed position of almost 90 degrees since the bent position is maintained over the majority of the stroke the elbow device 103 is preformed to be flexed in this bent position such that the student must push against the restrictive configuration of the elbow device 103 to extend the arm for insertion into the water during the entry phase of the stroke the floatation and positioning effect resulting from the combination of the elbow devices 103 and the wrist hand devices 104 automatically forces the body to lift and roll forward in the proper manner as the arm is brought in flexed position under the body during the pull phase of the stroke as with the knee device 101 or the ankle foot device 102 the elbow.