Which theory suggests that one must exercise the mind and body to maintain cognitive and physical functions?

The theory that emphasizes the importance of exercising both the mind and body to preserve cognitive and physical functions is rooted in the notion that active engagement in mental and physical activities helps maintain and enhance performance in these areas throughout life. This concept, often referred to as the "use it or lose it" principle, suggests that if cognitive and physical skills are not regularly practiced or stimulated, they may decline over time.

Research has shown that regular mental exercises, such as puzzles, reading, and learning new skills, alongside physical activities like exercise and sports, can contribute significantly to maintaining cognitive health, delaying the onset of age-related decline, and enhancing overall well-being. This approach advocates for an active lifestyle that incorporates diverse activities, supporting the idea that our mental faculties and physical capabilities are interconnected and can be nurtured through consistent engagement and practice.