Runners

1. There are three types of runners

1.1. sprinter

1.1.1. shortest distances

1.1.2. races may only last a few seconds

1.1.3. fast and explosive muscles

1.2. middle-distance runners

1.2.1. longer distances

1.2.2. versatile

1.2.2.1. it's a combination of speed and endurance

1.3. distance runners

1.3.1. races that are anywhere

1.3.2. 1,600 to 10,000 meters long

1.3.2.1. ,

1.3.3. small and light and lean muscle

1.3.4. mentally strong