Rutheford unsure about Tokyo 2020
Greg Rutherford will celebrate his 31st birthday in a fortnight and by his own admission, that's old for an athlete.
The London 2012 Olympic long jump champion is not prepared to bow out any time soon, though he admits Tokyo 2020 could be a long shot.
An ankle injury prevented Rutherford from defending his World Championship title in London this summer, a year after winning bronze in Rio.
Rutherford also went under the knife to fix a hernia issue in August and is slowly returning to full fitness, but he's only too aware of the importance of listening to his body.
"If I can still win major medals then I will go on as long as my body is able to do that," Rutherford told BBC Radio 5 Live.
"But I'm not 25. I'm looking at a couple of years at most.
"If my body is telling me that I can't do it anymore, I will jump ship because I don't want to be that guy who was once good at the sport.
"Sadly you find, especially in track and field, it's very difficult for people to switch off and they end up probably going on maybe two or three years longer that they should have done and then people start to forget the good periods that you had."
Rutherford has been named in Team England's squad for next year's Commonwealth Games on Australia's Gold Coast, with a title defence on the cards having won gold in Glasgow in 2014.
But he is under no illusions as to the limited time he has left in the sport, and with two young sons to provide for, he admits his worries for the future.
"It is always a huge concern because fundamentally it's how you pay the bills, it's how you live," he continued.
"I have a young family as well that I have to think about.
"I've always known that at some point obviously my career will come to an end. I am getting older, I'm about to turn 31 now, and in terms of track and field that's getting on a bit."