Berlin 400m final

Here are the times needed to qualify for each WC final:

'09: 44.97
'07: 44.86
'05: 46.03 (John Steffenson, BTW)
'03: 45.03
'01: 45.10
'99: 45.24
'97: 44.69
'95: 45.47
'93: 45.01
'91: 45.53
'87: 45.21
'93: 45.83

Last three Olympics:

'08: 44.91
'04: 45.27
'00: 45.53

If anything, there seems to be a trend towards faster times needed for qualification.

Interestingly, the times in the final clearly suffered after the tough semifinals of 2009, 2008 and 2007 (three rounds with two days between semifinals and final), but not in 1997 (four rounds with one day between semifinals and final). I have previously suggested on this forum that the 48h rest between semifinal and final now in place may allow for the onset of DOMS thus limiting performance in the final.