I'm only now reaching the point where my breathing is not ragged gasps. For the first few weeks my ragged breathing a thundering heartbeat were the only things I heard on the commute. Actually there are times now when I do actually try to work on my breathing. I'm still a long ways from in control, but I've always heard the same thing about in through the nose out through the mouth. Its particularly good in cold weather becasue your nose acts like a warmer for the air before it hits your lungs. Maybe by wintertime I will be in sufficient shape to actually try it out.