What is easier? 100km on foot or 100km on a bicycle? Almost all people already know how to walk and run, it's simpler and more intuitive. But I bet if you know

What is easier? 100km on foot or 100km on a bicycle? Almost all people already know how to walk and run, it's simpler and more intuitive. But I bet if you know how to ride a bike, you'll pick the bike.