sentence1: I 'm 14 and ran a 0.52 for the 400m , what time is acceptable to run at the D1 college level ?
sentence2: I have run two half marathons , clocking a time of nearly 1-hour and 50 minutes in both . I am a regular runner and I am capable of running 14 km in under an hour and 2.5 km in under 10 minutes . If I were to get myself prepared for a full marathon , what would be the best method ?