Mo Farah will not be slumped on the sofa on Christmas Day - the double Olympic champion will be running almost 20 miles.
The athlete covers 70 miles - and will be stepping up the distance to 120 - every week.
When he is not running, the BBC Sports Personality Of The Year nominee says he is changing nappies and feeding his twin girls, who were born in August.
He told the Radio Times: "Of course I'll be running (on Christmas Day)! I'm going to run twice, because my rivals will probably only run once, so I'll have done more than anyone else. I'll try to get 17 miles in at least. That's a minimum.
"When I come back, my wife cooks a lovely meal - I'll be making excuses, saying, 'I'm looking after the kids...' - and then we'll just chill out."
Farah, 29, said that becoming a father of twins had changed him more than winning the men's 5,000 metres and 10,000 metres at the Olympics.
"The birth was hard, but brilliant, tougher than winning two gold medals," he said.
"On the track, you know what you're capable of, but being at the birth you have no control. It's scary - I was so proud of Tania. I was a helpless spectator."
Farah, who also has a stepdaughter, said he wanted to expand his brood.
Asked about his wishes for next year, he said: "To win gold at next summer's world championships. In both events. And I want a baby boy. I can take him to football matches. I'm looking forward to a boy who can play for the Gunners."