400m 62 Rotich, Andrew (KEN) 54.56
800m 61 Kiprop, Asbel (KEN) 1:49.91
1200m 61 Kiprop, Asbel (KEN) 2:46.61
This is how you get faster. You get out of your comfort zone now and then and learn what your body is capable of.
hicham's "official" splits from iaaf in wr :
The commentator says they went through the first 400m in "just over 54 seconds", but that would be for the pace maker.