What physiological change might occur in older adults that affects mobility?

Reduced bone density is a significant physiological change that commonly occurs in older adults and can greatly affect mobility. As people age, the process of bone remodeling slows down, leading to a decrease in bone mass and density. This condition, often referred to as osteoporosis, causes bones to become more fragile and increases the risk of fractures. When bones are weaker, activities that involve weight-bearing or balance, such as walking or climbing stairs, may become more difficult or painful, ultimately impacting mobility and increasing the risk of falls.

In contrast, increases in muscle strength, enhanced flexibility, and improved joint function are not typical physiological changes associated with aging. Generally, older adults may experience a decrease in muscle mass (sarcopenia), joint stiffness, and reduced flexibility, which can further compromise their mobility. Therefore, the presence of reduced bone density underscores the importance of preventing falls and maintaining mobility through safe physical activities and interventions aimed at bone health.