"Sometimes when you are at a top club and you have been at a top club for your whole career and you are playing week-in week-out it is easy to get in that comfort zone," the England international told British media.
"For me to come down here and taste a different side of the Premier League, where you have to fight for everything, fight for every point and work as a team, it is definitely out of my comfort zone."
Wilshere completed his first 90 minutes in the league since Sept. 2014 in Saturday's goalless draw with Tottenham Hotspur.
"I haven't played 90 minutes in two years. It's a long time not to play 90 minutes and when you play game by game you start to get your confidence back and try more things," he said.
"I am working hard in training but you can't get that match fitness unless you are playing games."
Bournemouth, who are 10th on the table, travel to 17th-placed Middlesbrough on Saturday.
(Reporting by Shravanth Vijayakumar in Bengaluru; Editing by Ian Ransom)
