Miller last month set a world record in the bench press for her age and weight class, lifting 115.5 pounds during a World Association of Bench Pressers and Deadlifters competition in Lansing, Mich., The Indianapolis Star reported.

The previous record was 95 pounds.

Miller plans to lift 120 pounds in November at the world championships in Anaheim, Calif., the newspaper said.

Miller started lifting about 15 years ago when she realized she was beginning to lose muscle mass. She and her husband, Curt, started to work with personal trainer Pete Rogers.

"When we started out, I just wanted to stay fit," she told the Star. "Pete made everything happen. He made me believe in the strength I have."

Miller said she also has a genetic connection to physical strength -- her father was a 5-foot-4-inch, 135-pound boxer. He died at age 95.