Michael Doyle is keen to return to training in an attempt to banish the disappointment of the play-offs.
The skipper shares the pain of Unitedites following the the play-off semi-final defeat at Yeovil that sees the Blades consigned to League One for a third season.
"We have come up short again and it is disappointing, we have to look at ourselves over the summer," Doyle told BBC Radio Sheffield. "The play-off defeat sets the club and everyone back another year.
"Personally, I'm gutted, I've been down for the last week. Sitting around thinking about it hasn't helped, I still have that horrible feeling in my stomach, I want to get back in training as soon as possible.
"Yes, we have to recharge the batteries, but I want to get back into training as soon as possible and prepare for another nine months of hard work."
Doyle is predicting a strong League One when the season kicks off on 3 August.
He adds: "It will be a tough league with the likes of Wolves, Peterborough, Preston and Rotherham coming up, but we've got to concentrate on ourselves, hit the ground running and get some early points on the board.
"It has been a disappointing two years but we need to get the fans believing again."