Teaching three aerobics classes a week, 90-year-old Nancy Rosser has got to be in better shape than a lot of people half her age.
After celebrating her 90th birthday last week, the great-great-grandmother is also now surely one of the oldest active fitness instructors in Australia.
For around three decades Mrs Rosser has been teaching aerobics classes in Orange in the NSW Central West.
And if her class sizes are anything to go by - her popularity isn't slowing down anytime soon - much like Mrs Rosser herself.
In addition to loving what she does, the fitness coach explains that it's vital to "keep moving" - particularly as people age.
Mrs Rosser's PCYC 'Revitalise' aerobics classes currently boast well over 20 people. They are mostly senior women, but the class is open to everyone over the age of 50.
"Some of the ladies are in their 80s, others are in their 70s," Mrs Rosser explains.
"They're all quite fit, or have got different complaints and [are] working through them. [Aerobics] helps to keep them mobile and keep moving. You've got to keep moving."
Born and raised in Orange, Mrs Rosser has lived most of her life here - so much so that the street she lives on - Nancy Place - is even named after her.
Prior to her retirement at 62, Mrs Rosser had essentially been the local librarian - just without the qualifications. During the day she performed all the duties of a librarian at Orange City Library, and at night she taught aerobics classes.
It was the 80s and the fitness fad was at peak popularity - both in Australian and around the world thanks to Jane Fonda.
Even after fitness trends moved on, Mrs Rosser's passion for aerobics remained steadfast and her classes continued to be a permanent fixture of both her life and the PCYC program.
For her as well as so many others, aerobics was inclusive and also provided a vital social network.
"The social aspect [to aerobics] is pretty strong and they need that because a lot of them are on their own.
"There's a great need out there for [fitness classes] for more mature adults, because a lot of them are just stuck at home. I think they're really important. [Classes] get them moving."