treading water vs. sinking


Treading water is what a simmer can do while in a vertical position to keep their head above the surface of water, while not providing sufficient directional thrust to overcome inertia and propel the swimmer in any specific direction.

To sink is to displace part of the volume of a supporting substance or object and become totally or partially submerged or enveloped; fall or descend into or below the surface or to the bottom.


The difference is the strength that it takes to keep going. You have it or you don’t.