I was paging through Simple and Sinister today and came across the page that talks about breathing through a straw. The pictures caught my attention and I read the method of breathing with nose pinched. While running errands today I made a point to buy some straws and try this. I found it to be quite challenging to maintain steady breathing and I actually had a bit of a panic feeling, like I couldn't breathe. I worked on it for several minutes, trying to breathe per instructions in the book and it started to become a little easier. I'm going to continue to practice this. It sounds like this is supposed to create a relaxation response or retraining of breathing? I'm curious to hear other thoughts from others who have done this before. Ironically, I was listening to Joe Rogan's podcast with TJ Dillashaw today and TJ describes a similar breathing technique he used while training for his last fight. I'm not sure if this was the same technique but it sounded similar. I have done a small amount of breathing correctives before but with breathing in/out through the nose. One small caveat... Not to talk about myself too much but I've had an issue for a while with my left shoulder and essentially feeling like my entire left side of my torso was inhibited... Not so much weak, but just less 'neural drive' compared to my other side. Since I started breathing while pay attention to my ribs (not letting ribs flare), this has helped tremendously with feeling more stable through the shoulder and scapula area. So now every time I do a get up I place my left hand on my left ribs before the get up to make sure my ribs aren't flared, do a power breath, then have it and this seems to help.