Today I noticed on my run that a few of the runners were having trouble breathing and they just looked like they were having a heck of a time going. I noticed one thing they were doing that I had assumed most runners knew already. They had their shoulders slouched in, almost as if they were sitting over a computer keyboard. This effectively closes off part of your lungs not allowing you to take a full breath. The correct form should be pulling your shoulders back just a little, as it helps to open up your lungs so you can take full breaths. It's amazing how much of a difference this one thing can make in breathing. When I had started running again 6 months ago I had forgotten about this little trick for the first couple weeks or so and I struggled really badly trying to breath. It was like an "aha" moment for me when I remembered about this little trick. All of a sudden my breathing and running drastically improved. I saw those runners struggling today and I thought I should share this tip in case any of you are having the same problems. Most of you are much more accomplished runners than I am, or ever will be so most of you probably already know this.