Three years after having opted for road running, Farah showed no sign of cobwebs as he ran 21.330 kilometres over the 60 minutes behind closed doors at the King Baudouin Stadium
Four-time Olympic champion Mo Farah marked his return to the track at Friday's Diamond League meeting in Brussels with a stunning world record in the one-hour event.
Three years after having opted for road running, Farah showed no sign of cobwebs as he ran 21.330 kilometres over the 60 minutes behind closed doors at the King Baudouin Stadium.
Farah, who won 5,000-10,000m doubles for Britain at both the London and Rio Olympics, bettered Ethiopian Haile Gebrselassie's previous best of 21.285km, set back in 2007, by 45 metres.
Four-time Olympic champion Mo Farah broke the one-hour world record on his return to the track at Friday's Diamond League meeting in Brussels.— BBC Sport (@BBCSport) September 5, 2020
👉 https://t.co/5A2DgXzO8c #bbcathletics pic.twitter.com/EhENDVVnA3
"I'm very pleased to break the world record today," said Farah.
"What an amazing way to do it and show people what is possible.
"I feel tired, but at same time the part of race we had to work hard... we weren't sure what we were doing, we just helped each other and got through it and it's nice to break a world record."
It was a formidable record: the equivalent of 52-and-a-half laps at an average of 67 seconds per lap, or 2:47min per kilometre.
And at one stage, the 37-year-old Briton, also a six-time world gold medallist, looked to have dropped that vital programmed pace, with Belgian training partner Bashir Abdi still in the running.
There might have been no crowd, but the record attempt featured piped-in music, audience cheering and a visual time guidance aid: 400 LED lights installed in drainage covers that lit up to mirror the desired pace.
Farah and Abdi duly took of the flashing lights and upped the pace to get back on record-setting time.
Take a bow Sir Mo Farah 👏💪— Sky Sports (@SkySports) September 4, 2020
With five minutes to run, Abdi took the lead for the first time, sweeping Farah around on his coattails.
As the gun fired for the final minute, Farah opened up his rangy stride to shoot past the Belgian and maintain his form through to a second gunshot that ended the race.
Farah, who aims to compete in the 10,000m at next year's postponed Tokyo Olympics, will return to road racing next month when he acts as a pace setter in the London marathon for Kenya's world record holder Eliud Kipchoge and Ethiopian Kenenisa Bekele.