Inclusion Criteria:  Women and men with an age range between 50 and 85 years Being on the waiting list in the Traumatology service of the Hospital Clínico Universitario de Valencia for surgical intervention and implantation of a knee prosthesis To have an indication for the use of a primary total knee prosthesis with patella fitting To have the ability to get involved in the measurement sessions and understand the information provided by the evaluator, and To present good general health status.  Exclusion Criteria:  To be a carrier of a prosthesis in other joints of the lower limb To be a carrier of a unicompartment prosthesis To present previous knee fracture To present a previous intervention of lumbar spine or stenosis of diagnosed canal To present previous intervention of the hip, tibia or femur To have disabling painful pathology in the contralateral lower limbç To have recorded in their medical history the existence of a lower limb length asymmetry greater than 2 cm or, be wearing a shoe lif To have antecedents of neurological or orthopedic injury that may influence the ability to walk, (e.g. stroke) Being diagnosed with rheumatoid arthritis or another type of arthritis that affects other joints of disabling lower limb To present morbid obesity (BMI> 39) To be in a situation of moderate or high dependence To present severe cognitive impairment To develop post-surgical complications such as infection, deep vein thrombosis, arthrofibrosis, and periprosthetic fracture.