National records, world leads set at Doha Diamond League

McSweyn set an Australian record in the 3k while Kipyegon, Obiri and others set world leading times in their events

How to watch the Doha Diamond League

27 Olympic and world medallists to race this Friday in Doha

How masters athlete Jim Dyck became a Canadian record-holder

Despite few racing opportunities, Dyck has run two Canadian M55 records on the track this summer