[MindPower]

The deep breathing stuff is in this article here,
Limiting factors

heres the important bit Julie was talking about

I learned this trick after listening to renowned physical therapist Gray Cook not too long ago. He brought up a very interesting point concerning how we breathe and shoulder dysfunction. But first, we need to find out a few things.

1. Test your shoulder ROM (range of motion) for asymmetry. Make a fist with both hands and reach behind your back with both. Left hand internally rotates and goes up your lower back, right hand externally rotates and goes behind the neck. Have someone measure the distance between the two fists behind your back.
Now do the exact opposite (left externally rotated, right internally rotated) and measure the distance. Someone with poor scapular stabilization and/or poor thoracic mobility will have a noticeable discrepancy between the two measurements.
Note: For certain populations (such as overhead athletes: pitchers, quarterbacks, etc.) a noticeable asymmetry would be perfectly normal and should be expected.
2. Now take a deep breath. Seriously, go ahead, take a deep breath, I'll wait.
Did your shoulders rise when you took that breath? I'm willing to bet they did. Essentially, what you're doing is telling your levator, upper trap, and rhomboid muscles (all of which elevate the scapula) to fire... over and over and over and over. No wonder your shoulder hurts!
What you need to do is "reset" your breathing pattern to do more diaphragmatic breathing (breathe through your stomach). As Cook noted, we've lost the capacity to use our diaphragm correctly when we breathe. As you might've guessed, we need to fix the issue, but how?
3. To do so, lie on your stomach with your hands on your forehead, palms facedown on the floor, legs straight. Now take that same breath, but through the stomach. Basically, your low back should go up, not your chest/back. Do this for three minutes, making sure each time that your lower back rises.
4. After three minutes, re-test your shoulder ROM. Your shoulder ROM should've increased by a noticeable margin.