At present, the world records of men and women 1, 500m and 3000m are as follows: men 1, 500m 3 minutes 26 seconds 00, 3,000m 7 minutes 20 seconds 67; Woman 1500m 3 minutes 50 seconds 46,3000m 8 minutes 06 seconds 1 1. It is estimated that the maximum speed of running 2 kilometers is about 7 m/s.

For a runner, there are many ways to carry out speed training: going to track and field and repeating various sprints; Play speed games; Run down the hill quickly; Take part in competitions, etc.

Speed training is available to everyone, especially the elderly, because it maintains gait and good biomechanical structure of human body, which will gradually disappear with age. Many adults who have never run think that they just adapt to jogging at the speed of mile 10 minute day after day, regardless of the intensity and speed of running, which is incorrect.

Extended data:

Precautions for running

1. Do some squats and stretches before running to relax tense muscles and bones, and relax muscles and bones for the next run.

2. During running, mastering the rhythm of breathing and maintaining uniform and comfortable breathing can effectively reduce the fatigue of the heart and lungs and maintain abundant physical strength.

Don't stop immediately after running. It's best to walk slowly for a while and adjust your heart rate and breathing.