![woman running on stadium track](https://hips.hearstapps.com/hmg-prod.s3.amazonaws.com/images/woman-running-on-stadium-track-royalty-free-image-1587049572.jpg?crop=0.66635xw:1xh;center,top&resize=480:*)
Yasso 800s
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You can predict your marathon time based on how long it takes you to run 800 meters. Don’t believe it? You should.
You can predict your marathon time based on how long it takes you to run 800 meters. Don’t believe it? You should.