METHOD FOR CONTROLLING A PROSTHESIS OR ORTHESIS

The invention relates to a method for controlling a prosthesis or orthesis of the lower extremity, which prosthesis or orthesis comprises an upper part (10) and a lower part (20) that is connected to the upper part (20) via a knee joint (1) and is mounted so as to be pivotable relative to the upper part (10) about a joint pin (15); wherein an adjustable resistance device (40) is situated between the upper part (10) and the lower part (20), by means of which resistance device a flexion resistance (Rf) in an early and middle standing phase is modified, during walking, on the basis of sensor data, following initial heel contact up to the middle standing phase; wherein, following the initial heel contact, the flexion resistance (Rf) is increased to a value at which further flexion is blocked or at least slowed; wherein the progression over time of the flexion resistance increase and/or the maximum achievable flexion angle (Af) is modified on the basis of the inclination of the ground or a height difference (ΔH) to be overcome.