IMPORTANT – This document is suitable for the assessment of the conformity of prosthetic
ankle-foot devices and foot units with the strength requirements specified in 4.4 of
ISO 22523:2006 (see NOTE 1). Prosthetic ankle-foot devices and foot units on the market,
which have demonstrated their compliance with the strength requirements specified in 4.4 of
ISO 22523:2006 through submission to the relevant tests of ISO 10328:2016, need not be retested
to this document.
WARNING – This document is not suitable to serve as a guide for the selection of a specific anklefoot
device or foot unit in the prescription of an individual lower limb prosthesis! Any disregard
of this warning can result in a safety risk for amputees.
This document primarily specifies a cyclic test procedure for ankle-foot devices and foot units of
external lower limb prostheses, distinguished by the potential to realistically simulate those loading
conditions of the complete stance phase of walking from heel strike to toe-off that are relevant to the
verification of performance requirements such as strength, durability and service life.
This potential is of particular importance for the assessment of the performance of a variety of recent
designs of ankle-foot devices and foot units with specific characteristics that will only develop under
realistic conditions of loading. In addition, this document specifies a static test procedure for prosthetic
ankle-foot devices and foot units, consisting of a static proof test and a static ultimate strength test,
distinguished, besides other features, (see NOTE 2) by the potential to generate heel and forefoot forces
at lines of action conforming to those occurring at the instants of maximum heel and forefoot loading
during the cyclic test.
