Thats one good thing to practice 3 minutes twice a day. Put your back against the wall and try to do what you can see in the picture. Obviously the right posture is on the right side. https://www.google.ca/search?q=r%C3%...ml%3B375%3B319

Here is article about breathing: http://www.ncbi.nlm.nih.gov/pubmed/18200368