My sixth grade pupils have to run 2500 meters in winter. Please call me some skills. The body is short and the legs are short, and the perseverance is ok. After accelerating, I will run 200 meters per minute. I've tried to run far before, and there's a trick.

1. Don't keep your mouth open except inhaling when running, or your mouth will be dry after running.

Run slowly at first, and then accelerate.

3. Lean forward slightly when running, but don't lean forward too much.

Don't stick your whole foot to the ground when running.

I ended it myself. I hope it helps you.