When her husband was diagnosed with ASL the couple decided to take life by the horns and despite losing him three years ago she has continued to live life to the fullest.
Peggy, from Ponte Vedra Beach, Florida, said: "It's important to stay fit and healthy as you age so you can remain independent and happy as you grow old. I never give into my age.
"When I tell young people as well as older people how old I am their eyes open wide and they are astounded - which makes me feel on top of the world.
"I stay young because I feel young in my mind and stay up with today's music, news and sports.
"Most of my friends are 15 -20 years younger than me. It's all in the mind."
Peggy Hilbert works as a personal trainer and an aerobics instructor - and she has the body to prove it. Photo / Caters
Passionate Peggy teaches abs and body sculpting classes and a boot camp class every week.
She sees her personal trainer twice a week and walks every other day.
Her diet consists of six small meals a day, including two protein shakes.
She added: "Most all my life I have been athletic but now I would say I am fit.
"I was a runner until age 32. I am so happy I stopped then because I wouldn't be doing what I am doing today
"Then I started attending aerobic classes and it became a permanent high.
"I then started working out with a personal trainer in groups of four and weights became my best friend.
"It made such a great change to my body.
"In 2001 I started doing bodybuilding contests, and to my surprise I won a majority of them topping it off with the Masters nationals in Pittsburgh in 2003."
Peggy says keeping up with current affairs and pop culture helps her feel younger. Photo / Caters
Tragically her husband Tom died from ALS three years ago which spurred Peggy to raise $21,000 in charity walks.
Peggy said: "When my husband was diagnosed we decided that we would continue to be happy every day and live our life as normal as possible going through this process.
"He only lasted a little over a year after his diagnosis so I work relentlessly every year trying to obtain donations for the annual ALS walk."
Now Peggy works out with her niece, Jennifer King, also known as Instagram star Farmer Jen on her channel: bansheemoon.
Jennifer said: "Ever since I can remember Aunt Peggy has been moving.
"My first memories of her were when she was in her mid to late 20's and as the years progressed and I grew up, she never seemed to change much except that each year she was more and more fit.
