The research area of lower extremity focuses on the study of the lower limbs of the body, including the hips, thighs, knees, lower legs, ankles, and feet. This field of research examines a wide range of topics related to the structure, function, biomechanics, injuries, and rehabilitation of the lower extremities. Researchers in this area may investigate issues such as musculoskeletal disorders, gait analysis, sports injuries, prosthetics and orthotics, and physical therapy techniques for lower limb conditions. Overall, research in the lower extremity area aims to improve understanding and treatment of conditions affecting the lower limbs and to enhance the quality of life for individuals with lower extremity impairments.