Denholm, who is partially sighted, said the tool had been a massive help to her as she had long struggled with her legs and hips.
The app involves talking to a fitness coach over the phone who then suggests which virtual exercise classes she should take part in.
“The instructions are so clear that even if I was having a bad day and my eyesight wasn’t great, I can still hear the instructions and do the class,” she said.
She said having the fitness coach and doing online exercises with other people had made it easier to be consistent with exercising.
“It just pushes you a little bit more,” she said.
She said she had used the tool for about seven weeks now and she could walk around Durham now without walking poles for about an hour.
“I’m building up my strength and hope in the future to challenge myself again with a few hikes,” she said.
The pilot’s full results are due in May.