I swap clothes and exercise with my grandmother — people get us confused

This sexy sexagenarian is getting hot and sweaty with her glamorous granddaughter.

Personal trainer Lesley Maxwell, 64, has become a social media sensation after sharing videos that show her hitting the gym with her granddaughter, Tia Christofi, 21.

The age-defying nana — who hails from Melbourne, Australia, and boasts 117,000 followers on Instagram — said she also shares a wardrobe with Christofi, despite their 43-year age gap.

“We often share clothes and even bikinis, which is a bonus,” Maxwell told NeedToKnow.online on Thursday. “I think Tia is stunning and I’m blessed to have such a lovely granddaughter.”

Christofi — who has 220,000 Instagram followers in her own right — is super proud of her sexy nan, declaring: “We’re often mistaken as mother and daughter!”

“I aspire to look just as good as she does when I’m her age,” Christofi continued. “We try to fit in a session each week together, mostly at my home gym. We mostly do weight training together, I prefer training legs and booty, and she likes to train her upper body!”

Maxwell said her fit figure hasn’t come easy, and she works out five days a week in order to maintain her enviable looks. She also sticks to a strict diet, eating six small meals per day.

“I eat six times a day and my meals are made up of proteins and fats,” the fitness guru grandma said. “I go against the grain, don’t believe in fad diets or fasting.”

Meanwhile, Christofi claimed her nana also encourages her to watch what she eats.

“Most grandmothers bring cakes when they visit, but mine brings organic eggs, organic berries and makes buckwheat pancakes,” she said.

Maxwell has shared tips for other middle-aged women looking to tone up this coming winter, saying: “Of course, I understand that in the cooler weather it’s easier to cuddle up on the couch and perhaps be tempted by high-calorie food that has no nutritious value, however we can then gain weight.”

The sexy blond also said it’s important to exercise, declaring that those who are reluctant to workout should “start small and progress.”

“If you tell yourself to get up and exercise just for a few minutes, you will end up doing it for longer,” she claimed. “You have to get over the initial phase and it becomes a habit.”