What is a common biomarker associated with normal aging?

Decreased muscle mass is a well-documented biomarker associated with normal aging, known as sarcopenia. As individuals age, there is a natural decline in muscle tissue due to a combination of factors such as hormonal changes, reduced physical activity, and changes in nutrition. This loss of muscle mass can lead to decreased strength, mobility, and overall functional capacity, making it a significant concern for older adults as it can impact their ability to perform daily activities and maintain independence.

In contrast, increased flexibility, increased aerobic capacity, and decreased oxygen levels do not typically align with the common physiological changes that occur with aging. Aging often leads to a decline in flexibility and aerobic capacity, while oxygen levels in healthy individuals do not necessarily decrease solely due to aging. Understanding these changes is crucial for developing effective fitness programs tailored to the needs of seniors, helping them to maintain muscle mass and overall health.