803 runners managed negative split at Boston marathon 2014

From 31805 finishers at Boston marathon this year, only 803 (332 women, 471 men) of them ran a negative split (running the second half of the marathon faster than the first half). Meb Keflezighi, who won the race in 2:08:37 , ran the second half 5 seconds faster than the first half whereas Rita Jeptoo, winner of the female race in 02:18:57, ran the first half in 1:09:28 and the second one in 1:09:29 !

Time 1st half vs. time 2nd half] First half time to second half time - Boston marathon 2014