Lincoln City manager David Holdsworth says his players will be made to train at home on Christmas Day, with harsh punishment for those who do not.
The Imps face Grimsby in a Blue Square Bet Premier derby match on Boxing Day.
Holdsworth told BBC Lincolnshire: "I have to trust the players. They'll be given monitors to take home and be asked to do a certain amount of work.
"If they don't they'll be fined two weeks' wages and won't play. Is that hardline? I think it's professional."
Holdsworth, who has taken a tough stance on fitness since his appointment as manager in October, added that the alternative to training at home would be to bring the players in to the club for a training session.
"On Christmas Day do you want to come in? No, of course you don't," he said.
"But it's part of work. They'll be given a schedule and if they don't achieve that they'll be fined the maximum amount because they have a duty to the fans of the football club.
"The fans can know that win, lose or draw, we will have prepared correctly. It's a big game and I want us to to compete in it."
Lincoln are 17th in the table, having won seven of their 25 league matches this season.
They will face Grimsby twice in seven days, with the return league fixture at Blundell Park on 1 January.