The relationship between metabolism and aging shows that metabolic rates typically decline with age. As muscle mass reduces, the body burns fewer calories at rest. Factors like hormonal changes and decreased physical activity contribute to this shift. However, individuals can counteract age-related metabolic decline through consistent exercise, especially strength training, which helps build and maintain muscle mass. Proper nutrition tailored to meet the evolving needs of aging bodies is also crucial for sustaining metabolic function and overall health.