text: i like to run, but have trouble breathing, any suggestions? i know that i have to breathe in thruough the nose and out my mouth but for some reason i can for the first mile then i'm done. what speed are you running at?  if you are a beginner, try running at a slow to moderate speed 10-12 min/mile. after a couple of weeks try intervel runs - 30 sec of fast sprints and 2 minutes of slow jogging. you'll see results real fast