Watch Grandmother, 55, to Audition for Dallas Cowboys Cheerleaders

Sharon Simmons, a 55-year-old grandmother, is as slim and toned as a woman half her age, and she's preparing to go head-to-head with women even younger when she auditions to become a Dallas Cowboys cheerleader in May.

'I don't see a number,' she said, regarding her age. 'If I do, it's just a number. It's not that I can't keep up with [younger women] in the physical part of the training.'

Simmons, who has two grandchildren, is a certified personal trainer and nutritionist who began entering fitness competitions at the age of 50.

In the last five years, she's participated in more than 20 competitions, and has even won a few first-place titles, according to her website.

'To me, this is just like any other competition,' she said. 'There are steps to take to prepare, which is exactly what I'm doing.'

Simmons, who works in commercial real estate, first began dreaming of becoming a Cowboys cheerleader when she was a cash-strapped single mother in her 20s. She had planned to try out, and even had her mother take some photos of her to submit with the application, but she lacked dance training. And, ultimately, Simmons didn't have the courage to apply.

'Now,' she said, 'I'm not afraid. I'm more mature. I know what.