There are several reasons for leg and foot weakness in the elderly: First, the muscles of elderly patients will atrophy significantly with age, especially if the patient has poor digestion and absorption, malnutrition, and the degree of muscle atrophy will also increase significantly. In addition, patients who do not carry out rehabilitation exercises will make the symptoms of leg muscle atrophy more serious, resulting in leg and foot weakness. Second, the patient suffers from serious cervical and lumbar spine diseases, such as spinal stenosis and herniated discs, which can cause nerves to be continuously compressed, and degenerative necrosis can occur. After the loss of innervation of the leg and foot muscles, the strength will also be significantly weakened. Third, trauma, trauma resulting in limb fractures, especially lower limb fractures, will cause disuse atrophy of the muscles around the fracture, and the patient will also have clinical symptoms of leg and foot weakness.