I play soccer and and go to the gym so Ihave very good lung capacity. But when it comes to distance running I can't go past a certain point which is around the 5 mile mark or around 45 min span. Usually what happens is a lot of pain in my ankles and Iwant to be part of a half marathon in the summer, yet I can't do any progress. So any advice.
Run 1 mile everyday and your time limit is 12 minutes. Track your time and try to bear it each time.