Fig. 1

Flowchart of the 5-week experimental trial. PP participant with transfemoral amputation, T0–T4 measurement moment week 1 to week 5, C Test with current prosthetic knee, A test with active prosthetic knee, SWT 2-min treadmill slope walking test, 2MWT 2- minutes’ treadmill walk test, VAS visual analogue scale, RPE Rating of Perceived Exertion, NASA–TLX NASA–Task Load Index. C and A are altered over week to account for order effects