Effects of Short Foot Exercise on Knee Pain, Muscle Tone, Balance, and Quality of Life in Flexible Flatfoot Patients

Inclusion Criteria: * BMI (Body Mass Index): If between 18 and 25 kg/m² * Litigation period: If knee pain lasted for more than 6 weeks * Navicular drop test: If it was 10 mm or more * Numerical assessment scale: If knee pain was 4 or more * Health status: If you are a person without health problems and are trying to participate in the experiment Exclusion Criteria: * History of knee surgery: If you have had knee surgery * Treatment history: If you have received physical therapy for knee pain in the 4 weeks before the start of the study * Mental status: If you have a psychological disorder that may interfere with your participation in the study * Injury status: If you have a current serious injury affecting the lower extremity joints and foot * Lower extremity alignment abnormalities and specific conditions: If you have structural flat foot, scoliosis * Diseases and other conditions: If you have diabetes, rheumatoid arthritis, or menopause * Neurological disorders: If you have experienced a neurological disorder within the past 6 months