Behavioral Psychology Question

Photo Credit: Drew McLellan

I am a bass player and the other day I was at my lesson when my teacher asked me to play some scales and when I played them she noticed that I didn't breath until I got done with them. So she told me to practice breathing throughout the day as I work, and play.

I noticed that I hold my breath at work also when I want to get something done fast...so anything my brain thinks I am slow at, it decides that making me hold my breath will make me do it faster.

My question is:

How do I stop myself from relating quickness with holding my breath?

And how do I stop relating a relaxed state of mind with slowness?