Common instruments for measuring osteoarthritis (OA) severity, such as the Western Ontario and McMaster University Osteoarthritis Index (WOMAC), quantify patients' baseline and changes over time well. These tools are suitable for assessing the condition of osteoarthritis of the hip joint. The article questions whether exercise actually helps patients with this diagnosis. The WOMAC index measures pain, stiffness and physical function. It is used to monitor the course of the disease in patients with hip OA. Tools like WOMAC capture changes in symptoms over time. The article discusses the effectiveness of exercise based on these measurements.