Freestyle breathing must be straight, low, and fast. The breath...

The breath needs to be fast and fit within the rhythm of the stroke without disrupting it.
That rhythm is what allows swimmers to hold faster stroke rates.
The breath also needs to be low and straight.
When swimmers lift or crank the head, they will lose their alignment.
That disrupts the stroke and often disrupts propulsion as the head pulls the body and the arms out of position.
The less the breath disrupts the stroke, the faster they’ll swim.
They happen with a plan that may take years to play out.
The skills, the strategies, the sets, the progressions.
It’s what it takes to make it happen.