As we age, our bodies go through many changes. We lose bone density and muscle tissue. Our joints become inflexible and stiff. Over time, the weight of our bodies shifts forward, leading to an irregular gait and slouched sitting. Poor posture also contributes to improper alignment of the spine, which strains the back muscles and compresses the spinal discs, resulting in lower back pain. When this occurs, the body is forced to overextend itself, making postural correction difficult.