Rudisha said he believes he is in even better form than last year, when he glided away from the field to win his second Olympic gold in Rio in 1 minute 42.16 seconds - his fastest time since the London Olympics when he smashed his own world record (1:40.91).
"I have changed my training. I do a lot more mileage again," said Rudisha. "It is an aspect I lacked since I injured my knee in 2013. I have always had pain whenever I make long runs. But it is gone now, I can now put more work in during training and I am really happy."
http://news.xinhuanet.com/english/2017-06/12/c_136360055.htm