Plus if you're a knowledge worker it can help to engage in physical activities and even mental ones that exercise your mind in different ways than your job does

Plus if you're a knowledge worker it can help to engage in physical activities and even mental ones that exercise your mind in different ways than your job does. Seymour Cray famously used dig under his backyard when he was stuck on design problems for his supercomputers. He claimed elves from the nearby forest (the destination of the tunnel he was digging) came into his study and solved his problems while he was out digging the tunnel. He considered the digging to be an essential part of his design process.