"It does not matter how slowly you go as long as you do not stop."
-- Confucius: The Analects
We are born in societies which keep us safe and confined in houses, vehicles, away from danger ... and life. There's a lot to do inside in a modern life, but we should not forget the world outside exists. Otherwise, sooner rather than later our bodies give up and stop pretending to be alive.
These days there are social media (like Strava), or games (like Geochaching, Ingress, PokemonGo, WizardsUnite) which entice us outside for our good.
Here they are, not sorted by preference, but from the lowest to the highest energy expenditure: