A simple explanation of the physics behind your movement in water and how to reduce resistance for more efficient diving.
Understanding the physics of movement in water turns you from someone who fights the water into someone who voyages in it.
Water is 800 times denser than air. Every movement in it requires more. Correct position reduces this resistance.
A straight horizontal body with arms close to the body has the least resistance. This is what makes the diver fly, not swim.
The efficient diver works with the water, not against it.