I do school track 5 days a week. I am an excellent sprinter but need to build stamina. How can I do this?

Also, what foods would I eat to do this?

I do school track 5 days a week. I am an excellent sprinter but need to build stamina. How can I do this?
run a half mile every day (not that long once ur used 2 it) and dont eat anything right b4 u run
Reply:To build stamina, your repetitions should be longer than the distance you race. A 400m runner should be doing repeats of 500-800. A 200m runner should do repeats of 250-500.
Reply:Remember this: Everything starts and begins with the 400. This is your stamina, strength. If you run the 400, even if you run in during practice this will help your 100 %26amp; 200 times come down, because you have the strength to finish. Most sprinter don't do it cause it hard, but it works. Hopes this helps.