I live in a retirement community -- a gated community of about 15,000. Many people move here to play golf, but they also get into a lot of activities they did when young (or wanted to do) like other forms of fitness, community theatre, and an incredible array of hobbies. I practice basketball with 70 and 80+ players and am amazed at how well the principle of doing youthful activities works. The mind is incredibly powerful at making invisible connections.