If I'm trying to make a move on a deer using terrian to my advantage.
With a nothing to lose but everything to gain situation.
Running, jogging , slow walking over a short or long distance.
I'm looking ahead for a tree to brace on, or if not a kneeling position to take the shot.
Having a tight grouping zeroed rifle compensates for error.
Most important thing IMO when your blood is pumping and your breathing is fast.
Is to exhale and shoot at the natrual 1 to 2 second max pause at the bottom of your breath and let the crosshair settle down naturally from the exhale onto your shot.
You might get away with repeating 2 or 3 cycles of a respiratory pause doing this to get off a shot.
But that 1st cycle is your money maker.
After a couple of cycles of doing this .
Your lungs and blood are screaming for 02 if ya cant get it done and your vision will blur on ya faster at the bottom of your exhale.

JME......