Turner took time to recover from a pre-season trip to the Far East with Sunderland, followed by another hectic few days with the move to Norwich at the end of last month.
"I'm not far away now in terms of fitness. It did take it out of me going to Korea and then coming back and coming straight to Norwich, and taking a few days for the deal to be done, so I'm pleased now I'm back in training and getting games and back on it," he told Pink 'Un.
"It's the best way to get your fitness up, playing games of football, being out there on the pitch.
"I was feeling stronger and stronger as the game went on."