Proper Technique Head Position
The slightest changes in technique and body position can compound into a noticeable difference in performance. This is mostly due to the fact that the water we swim in is far denser than the air we normally move around in, about 800 times denser. Meaning that every inefficiency and movement that does not maximize our aerodynamics can have a heavy cost on both the time and effort it takes us to reach the finish.
Having proper head position while swimming is one of the easiest things to fix in terms of improving our overall efficiency in the water. Not only limiting the drag forces present on our heads, and limiting the force of surface tension against our movement, but also helping to keep the rest of the body in proper position as a result.