Standing on slopes - how current microprocessor-controlled prosthetic feet support transtibial and transfemoral amputees in an everyday task.

The study included only four transtibial and four transfemoral amputees, and the authors state that statistical power was limited. All amputees were K3 or K4, so the findings may not apply to less active people with lower mobility grades. The test only measured standing on 10° slopes, so it cannot show whether these feet help with walking or other movement tasks. The paper does not describe randomization of foot order, and participants chose freely how to stand, which may have affected posture and variability. Prosthetic ankle torques were not directly comparable between feet because the mechanical ankle position differed by foot design. The Elan foot tested had no stance function, and a newer commercially available version had different damping. The Raize foot was not tested in transfemoral amputees, so the comparison is not complete across all feet for that group.

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Do not read these biomechanical results as proof that a microprocessor-controlled foot reduces falls or improves daily life. The study measured standing on 10° slopes in four transtibial and four transfemoral amputees, and for transfemoral amputees the knee stance function also changed the result.