Age can affect fitness levels and health outcomes due to physiological changes, including reduced muscle mass, strength, and metabolism. Older adults may face declining cardiovascular fitness and increased risk of chronic diseases, making regular physical activity essential for maintaining health and mobility. Tailoring fitness programs to accommodate these changes can help enhance physical capabilities and prevent injuries. Additionally, older individuals can benefit from strength training, flexibility exercises, and balance activities to promote longevity and independence, emphasizing the importance of adapting fitness strategies throughout life.