Reciprocally guided hip joints are suitable, for example, for patients with flaccid lesions from TH-5 to L-3 or for other diagnoses that require reciprocal joint guidance. We distinguish between 2D movement for safe, energy-saving walking with pelvic rotation and the conventional 1D movement variant (flexion/extension). Unlocking for sitting is controlled by a Pre-Select system. Pelvic stabilization and motion transfer are provided by a rocker bar mechanism.