The locomotor system is also known as the musculoskeletal system. It is made up of the skeleton, the skeletal muscles, tendons, ligaments, joints, cartilage, and other connective tissue. These parts work together to allow movement. The changes that occur with aging can lead to problems with mobility, or a person’s ability to move around. Mobility problems may be unsteadiness while walking, difficulty getting in and out of a chair, or falls. There are common conditions in older people that can contribute to mobility problems, such as muscle weakness, joint problems, pain, disease, and neurological (brain and nervous system) difficulties. Sometimes several mild problems occur at one time and combine to seriously affect mobility.