[Stress and quantification of pressures borne by the hip in unilateral support in the sagittal plane. I]

Thanks to the works of Pauwels, the pressures sustained by the hip during unilateral weightbearing in the frontal plane are now well known and have given rise to a number of surgical applications. Considered as negligible by Pauwels, the sagittal plane has been little studied; in fact, with Pauwels' methodology, but taking into account the muscular moments, it appears that the forces exerted in the sagittal plane are far from being negligible and vary, according to the phase of weightbearing, from once the weight of the body (weightbearing on the sole) to two and a half times the weight of the body (weightbearing on the heel).