San Diego State coach Steve Fisher, who turns 70 in March, isn't ready to retire just yet, as he signed a three-year extension with the Aztecs on Wednesday.

Steve Fisher has guided San Diego State to five consecutive appearances in the NCAA tournament. Kent C. Horner/Getty Images

"It still doesn't feel like work," Fisher told ESPN.com. "I feel the same exhilaration and excitement as I did 15 years ago."

His current four-year deal was set to expire after this season, and there had been speculation that he might call it a career.

Fisher is best-known for taking over a Michigan team just prior to the 1989 NCAA tournament and leading the Wolverines to the national title.

He has also built a San Diego State program that was one of the worst in the Mountain West to one that has made eight NCAA tournament appearances -- including a current streak of five in a row. He has a record of 314-176 with the Aztecs.

The Aztecs beat No. 25 Utah on Tuesday and are considered the favorites to win the Mountain West this season. On the recruiting front, Fisher's staff has brought in a trio of top 100 players this season.

Fisher said he will still evaluate whether he will return after each season, but he wanted to put the speculation to rest that he might retire at the end of this season.

"It really was more of an administrative decision," Fisher said.

The Associated Press contributed to this report.