Everyone here thinks pro distance runners can run at least 49/50. They think all milers can run 46. And 800m runners 45 or quicker.
With such disrespect for the 400m, I wonder what can you, the Letsrunner, manage?
I don't want your hand times relay split. You might wanna accompany the time with your best time at another distance also e.g.
53 400m
14:15 5k