Do you love to run? Believe me, I want you to run for the rest of your life. There is one thing that I learned from intensive training for the Olympics. You need to keep your workouts varied with cross training. Often athletes get little nagging injuries from overuse of a particular joint. So if you are a runner, I wholeheartedly recommend that you try rowing indoors to keep up your cardio and save your joints for many many years of injury free running.
Xeno Muller