We wanted to find out just how much speed our best indoor 800m runners had with their all-time best 400m efforts.
So we compared our current top 750 half-milers against their 400m bests from last outdoor season. Note: We used this variable not only to give us more depth on this list, but also because many athletes ranked here don't have indoor 400m marks yet.
Below, you will find the top half-milers against their best outdoor 400m from the 2017 season.
After the jump, we changed the variance to determine who had the overall fastest 2017 outdoor 400m time from the top 750 indoor 800m runners.