In his second spell at the club, he has already hit two goals in as many league games, and is looking for a healthy return this campaign.
He told the Nottingham Evening Post on Tuesday "Last season I'd been out for a year and that makes a big difference," he said. "This season I'm really looking to kick on and have a good season.
"The difficulty last season was getting back up to fitness. I did a fair amount of training, but you can't replicate playing football.
"I've come back this season half a stone lighter and I feel a lot better for it."