Understanding the arc of life. Life in your 20s can be more about horsing around with your friends, but after 40 its more about spending time with your family (your friends become less available because they all started families).
Discovering fitness. Imagine someone who sits in their car on the way to work, then sits at work, then comes home and watches TV while sitting. That person is unhappy because they are sitting all day. Think of kids, they want to run around and play soccer, go to karate, do gymnastics... we're not so different. Hit the gym, hit the bike machine/trail, hit the weights, do a 5K, hit the climbing gym, stretch, do a handstand, do a butterfly kick, do an aerial
Live in a walk-able area if possible.
Learn a foreign language.
Eliminate vices
Discovering fitness. Imagine someone who sits in their car on the way to work, then sits at work, then comes home and watches TV while sitting. That person is unhappy because they are sitting all day. Think of kids, they want to run around and play soccer, go to karate, do gymnastics... we're not so different. Hit the gym, hit the bike machine/trail, hit the weights, do a 5K, hit the climbing gym, stretch, do a handstand, do a butterfly kick, do an aerial
Live in a walk-able area if possible. Learn a foreign language. Eliminate vices