Man, I dunno, I think I'm just outta the routine -- At less than the half mile mark I'm seriously loosing my wind. Almost to the point of hyperventilating. I've still got strength in my legs and I've gotten past my shin splints but the moment I step it up from a job to a run, my lungs go. I can get a mile not problem if I job, but I loose my wind everytime I sprint. I can't even try to control my breathing -- I almost lost my breakfast this morning. Anyone have some helpful hints?