no it is not healthy for a nine year old boy to run a ten kilometer run.
an ten year old boy would run 6-8 minutes to run in a mile
Yes
He did not run the 800 as a 14 year old.
13 seconds
Yeah but i highly doubt a 13 year old boy got that.
Run
An African Lemur's top speed is 20km/h (12mph)
It is almost impossible for a 15 year old to run a 4.4 40 unless he has trained almost all his life
well I would say about 14 mph because when I was 8 I was running my average at 10 mph when I was 9 I was running my average at 12 mph and now I can run my average at 13 mph my top was really close to 15 mph so that's how I came up with that.
Eric Hulst 14.57.93
about 60 seconds.