You can walk without getting tired. Swimming at a slow pace can be almost as easy as walking.

Chloe McCardel swam for 41 hours and 21 minutes (124.4 km or 77.3 miles) nonstop in the ocean. Veljko Rogošić swam 50 hours. Sarah Thomas for 54 hours. Ricardo Hoffman for 84.5 hours in a river. With the 10 steps I’m about to tell you, you can surely swim for an hour and a half without getting tired.