A prosthetic foot (70) incorporates a foot keel (77) and a calf shank (72)
connected to the foot keel to form an ankle joint area of the prosthetic
foot. The foot keel has forefoot and hindfoot portions and an upwardly
arched midfoot portion extending between the forefoot and midfoot
portions. The calf shank includes a downward convexly curved lower end
which is adjustably attached at a portion thereof to the foot keel by way
of a releasable fastener arrangement. The upper end of the calf shank is
movable longitudinally of the foot keel in response to force loading and
unloading the calf shank during use of the prosthetic foot. A device (71)
connected between the ends of the calf shank limits the extent of the
motion of the upper end of the calf shank relative to the lower end and
foot keel. The upper end of the calf shank can include an alignment
coupler device (92) thereon having adjustable slide mechanisms to adjust
the medial/lateral and anterior/posterior position of the calf shank
relative to a supporting structure on the leg of the person using the
prosthetic foot.