I would like to do 5km in 19:59 so I tried to see what my best time would be for 1km.
I did a 4:09 which isn’t to bad I guess. I waiting 4 minutes and then ran a 5:31 back.
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I would like to do 5km in 19:59 so I tried to see what my best time would be for 1km. 
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