The Dons have been putting in the work in Cork this week during a training camp, two weeks before the Clarets themselves head to the Irish city for their own training camp.
And McInnes is pleased with the fitness of his players ahead of the first leg of the second qualifying round tie with Burnley at Pittodrie on Thursday, July 26.
"This has been the most I've been able to do with the players in pre-season since I came to the club," he told the Daily Record.
"They have had the benefit of extra rest so we have been able to throw more work at them.
"The way they have tested and the way they have performed shows me that extra rest has allowed them to become fitter and stronger.
"We are not having to condense all the work into the first week like we have in the past.
"In previous years we have just been trying to fire them up quickly so they have not had a pre-season in the true sense. That will benefit them all and will help us going into the European games."