CHICAGO (CBS) – U.S. Sen. Mark Kirk is making big strides in his recovery.

The freshman senator, who had a stroke in January, says he’s walking a lot and even climbing stairs.

His office released a photograph of Kirk talking with U.S. Rep. Judy Biggert taken earlier this week.

He says he walks more than 3,600 steps a day and has already walked more than 14 miles. But he’s not done yet.

“As I move into a new phase of outpatient rehabilitation for occupational and physical therapy, I will continue to work hard in order to further regain my strength,” Kirk said in a written statement.