Background: The benefits of Lycra-garment-orthoses have not been convincing. We wanted to evaluate the effects of Lycra-hip-orthoses with several objective and subjective methods. The hypothesis was that the Lycra-hip-orthosis would improve gait, reduce lateral instability in the pelvis, reduce Trendelenburg gait and increase daily activity. Methods: Ten patients with neurological disabilities with reduced stability of the pelvis were investigated at a 3D gait-lab with and without Lycra-hip-orthoses at baseline and after a follow-up period of median 7.5 (range: 6-19) weeks using the Lycra-hip-orthosis. The patients also used an Accelerometer to measure activity and filled in questionnaires at baseline and endpoint. Results: Apart from a reduction in anterior tilt of the pelvis, there were only minor changes for all the measured parameters. Conclusion: We found no clinically relevant effects after wearing Lycra-hip-orthoses for a median follow-up time of 7.5 weeks.