Tactical breathing for golf helps reduce stress and additional adrenaline in your body.
How to do it:
Inhale to the count of 4 (through your nose).
Hold your breath for a count of 4.
Exhale for a count 4 (through your mouth).
Hold your breath for a count of 4.
Repeat.

The Tactical Breathing For Golf method will reduce nervousness, lower tension and help you regain control of thinking thus ensuring a good performance.

Try it to play better golf.