The valgus position of the knee or "X - leg" is a deformity of the lower extremities, which is characterized by the fact that the knees are glued and the feet separated, while the support is generally on the inside of the foot. It can occur as a congenital or acquired disorder. In the second case, it most commonly occurs as a result of poor position of the hip joint and / or feet. This deformity in most cases is a side effect of flat feet, which give rise to internal rotation of the shin and tense peroneal muscles. For X legs also, the receptacles in the hip joint are chronically strained and pull and rotate the hamstring inside. This condition is accompanied by weak and stretched gluteal muscles, and is particularly inactive gluteus medius, which makes the greatest contribution to lateral knee stabilization. If valgus the position is not severed in time, it can lead to deformation of the spinal column followed by constant low back pain and injury to the ligaments and meniscus of the knee. Cause of irregular loading in persons with this deformity is prolonged or postural fatigue and leg pain, which is often accompanied by pain in the lumbar region spine. Therefore, when planning training for clients with this problem, we must pay attention first to eliminate deformation. Obese people, especially people wo are standing too long, but also pregnant women are at risk for this condition. When testing the client was found to have valgus knees (x legs), the problem arose from birth so it was difficult to correct. At the beginning of treatment with a client, an adductor shortening was found, flexors, stretched m. gluteus maximus and m. gluteus medius, and hip abductors. At the beginning of the treatment with the client, we started kinesthesia to present and make him aware how to hold it properly and in what position the pelvis and lower extremities need it be, and mobility and flexibility. In the second stage we worked abdominal breathing through progression to strengthen the abdominal muscles, spine, and lateral muscles part of the hull. The third stage is to strengthen the muscles of the external rotators of the hip joint. The exercises in this stage were done through a slight progression with a load at which we have been constantly monitoring the client's progress. In the fourth (final) phase, we did the exercises in an upright position with a load to see the client's progress, from position on the back, four-legged to upright.