I am a new runner that took the C25K class at my church last summer. Due to my allergies and some asthma I still can not run the entire 3 miles of a 5K. I due use an inhaler before racing. I alternate some running and walking and generally finish around 45 min. I am doing the Royal Family 5K in March and would like me time to be better. Any tips on how to build myself up would be greatly appreciated. P.s. I do have a treadmill and am going to try and be better about using it during the week.