Before revision:  We find that the preferred walking speeds are lower for unilateral amputees for short distances , but the distance-dependence of preferred walking speed is less steep than for non-amputees. In circle walking, unilateral amputees slow down when walking in circles of smaller radii and above-knee amputees in particular walk faster when the prosthetic leg is outside the circle.
After revision:  We find that the preferred walking speeds are lower for short distances and lower for circles of smaller radii and above-knee amputees in particular walk faster when the prosthetic leg is outside the circle.