It appears his 10 day time trial went from 400s to 350s as he got older. So using this 400 before a 100m, would a 300 trial be good enough, or is there something about running close to 40 seconds??
It appears his 10 day time trial went from 400s to 350s as he got older. So using this 400 before a 100m, would a 300 trial be good enough, or is there something about running close to 40 seconds??