You get very tired, and there was a certain amount of pain and you slow up. Your legs are so tired that you are in fact slowing. If you don't keep running, keep your blood circulating, the muscles stop pumping the blood back and you get dizzy.

Roger Bannister was a real go-getter. He was always running around, trying to break records. One day, he decided he was going to be the first person to run a mile in under four minutes. He was so determined, he trained hard and ran even harder! On May 6th, 1954, he finally achieved his goal, becoming the first person to break the four-minute barrier. Since then, he's been an inspiration to runners everywhere! So if you ever want to run a mile in under four minutes, just remember: if Roger Bannister can do it, so can you!