Hi All, this is my first post to the forum but I know you're a friendly bunch so I'm sure that you'll be able to help...I graduated about a month ago, since then I've struggled with my breathing during each 30 minute run. Today I managed a good 20 minutes running then had to stop for a 5 minute walk before getting my breath back and finishing with a 5 minute run. How can I improve my breathing so I can run the full distance without having to stop to catch my breath? I'm puzzled as to why this is happening now when I managed a 30 minute run on 4 occasions before I graduated. Thanks for any advice.