It's important to distinguish between the Breaking2/INEOS pacing (with a rotating team of pacemakers that drop in and out of the race) and the pacing that has b

It's important to distinguish between the Breaking2/INEOS pacing (with a rotating team of pacemakers that drop in and out of the race) and the pacing that has been allowed in every world record (pacemakers that start with the field, but may drop out, as does Sowinski in his own pacing). In fact Kipchoge's legal world record (the 2:01:09, not the 1:59) had pacemakers for the first 25km (of 42.2).