The veteran has won the Premier League with the Foxes in the past.
But he says that he is learning more than ever under Rodgers, who has taken Leicester up into the Champions League places.
"Even though I have been in the game for a long time, I noticed under Brendan Rodgers how much I can still learn as a footballer," he told German magazine Socrates.
"Brendan is a phenomenal coach, both tactically and in terms of team leadership. Tactically, he quickly changed us from a counter to a possession team.
"He only took over last spring, but we are already playing a completely different kind of football that both players and fans really like.
"I could never have imagined that this could happen so quickly. From the beginning, all the players stood behind him and his ideas and this is due to his excellent man-management. He pays incredibly good attention to everyone's needs."