you are assuming that swimming is static. When you roll from side to side, as swimming is never done face down in the water that is merely one of th positions that you move through, you present less surface area then if you were laying face down flat in the water. Face down both of your shoulders are in the water. When you are on your side only one shoulder will be in the water.

Long & narrow is more hydrodynamic than long and broad. I'm no physist, but I did make an A in college physics. I also read the paper everyday in that class so there is your disclaimer.

---

Brian Stover USAT LII
Accelerate3 Coaching
Insta