How does physical activity affect the nutritional needs of older adults?

Physical activity plays a significant role in influencing the nutritional needs of older adults, with an increase in both protein and calorie requirements being particularly noteworthy. As older adults engage in physical activity, their bodies require more energy to fuel the increased muscle activity and to support recovery. This is essential for maintaining muscle mass, strength, and overall functionality, which are crucial for independence and quality of life in later years.

Additionally, protein is vital for repairing and building muscle tissue, which often declines with age. Increased physical activity stimulates the need for higher protein intake to help preserve lean body mass and support the body's recovery processes after exercise. For older adults, ensuring adequate intake of both calories and protein is essential not only for maintaining weight but also for supporting metabolic functions and overall health.

The other options do not accurately reflect the impact of physical activity on nutritional needs. While energy requirements may vary based on individual activity levels, an increase in activity typically corresponds with a rise in nutritional needs. As such, understanding the relationship between physical activity and nutrition is critical for promoting healthy aging and physical well-being in older adults.