Assuming I have some basic fitness from a jog here and there and ok'ish starting speed from a session of "strides" and speed drills every now and then for soccer (time trialed a 27.02 200m a few days ago), how close could I get to my lifetime potential in the 400m if I trained properly, diligently and consistently starting now for the next 5-6 years?
For example, assuming a 55 second lifetime ceiling that I could hit if I started at 14 and trained well and consistently, what are the chances I could hit that 55 second 400m starting at the age of 31? I definitely expect the odds to be unfavorable, but is there a decent chance I'd be at least reasonably close?
Would really appreciate any help or insight offered with those with experience