Iam basically starting from scratch after a number of years away form the sport due to injury. I have in the past got to a decent level in the sport. Aged 20 I ran 8:28 3km and 14:45 5km. My highest mileage was low around 50-60mpw at the very highest. I am willing to put in the work to achieve my aims of running sub 14 and sub 29 ovet the next few years. I do have talent but is this unrealistic. I am now 26, weigh 75kg, 1.77 tall.