Anti-aging mogul Bryan Johnson, 45, touts machine that feels like ‘20,000 sit-ups’

The anti-aging mogul who spends millions each year to maintain the body of an 18-year-old has revealed another part of his health routine – a device he claims allows him to do the equivalent of “20,000 sit-ups” in just 30 minutes.

Bryan Johnson, 45, explained that he uses the grueling device as part of a multimillion-dollar “anti-aging protocol” that has garnered widespread attention on social media in the past few months.

In a video posted to his Instagram account this week, a shirtless Johnson was filmed strapping himself his midsection to the device – which appears to stimulate the core muscles – and cranking it up to its highest setting.

“What it feels like is it’s pulling your entire stomach out – it’s ripping it out,” Johnson said in the video posted on his Instagram account.

Johnson then removes the device to reveal his stomach muscles and tout the latest progress in this extreme fitness regimen.

“I thought I would be terribly sore after doing this, but actually, I’m not,” he added. “Surprising, it’s not. But I will say that my midsection has never been stronger in my entire life and it has essentially changed how I feel athletic.”

Johnson, a software developer who amassed a fortune after selling his payment processing company Braintree Payment Solutions to eBay for $800 million in cash, has now shifted his focus to the concept of “bio-hacking.”

The tech mogul spends $2 million per year and has assembled a team of 30 doctors and medical experts as part of the effort to reverse his body’s aging process.

Johnson claims his philosophy, which includes a strict vegan diet of just 1,977 calories per day, a rigorous exercise schedule and rigid sleep routine, has given him the heart of a 37-year-old, the skin of a 28-year-old and the fitness of an 18-year-old.

The health guru said his ultimate goal is to have all of his internal organs, from his brain and liver to his penis and rectum, to work as well as they did when he was in his late teens.

“What I do may sound extreme, but I’m trying to prove that self-harm and decay are not inevitable,” Johnson told Bloomberg in an interview published January.

As The Post reported In February, Johnson faced public scrutiny of a different kind when his former girlfriend, actress Taryn Southern, filed a lawsuit accusing him of ending their relationship when he learned she was being treated for breast cancer, among other allegations.

Southern alleged that Johnson was “manipulative” and “controlling” during their relationship.

Johnson fired back, accusing Southern of attempting to extort him with by “threaten[ing] to make outlandish and salacious allegations about [him] in public forums unless he paid her exorbitant demands.”