Mo Farah has suggested 2017 is likely to represent his final season on the track, as he seeks to spend more time with his young family.
Farah has dominated the men's distance-running events in recent major championships, following up his double Olympic triumph in London four years ago by winning world 5000m and 10,000m gold in 2013 and 2015.
Speaking at a news conference ahead of this weekend's Diamond League meeting in Birmingham, the Briton said: "I've probably got 2017 and then after that we'll see, 2017 will probably be my last track year.
"I'll probably do some road races, but I really struggle with being away from my kids. I'm on the road for six months, only there for half their lives really.
"They look me in the eye and say are you off again, and that's one thing that breaks my heart."
As he prepares to defend his Olympic titles at the Rio Games in August, Farah outlined a determination to enjoy further success for the remainder of his track career.
"I'm just thankful I'm injury free and still got the right mind," he added. "My aim is to continue winning medals.
"I don't need to change too much, I'm still as hungry and want to do the best I can."