Feels like 20,000 sit-ups in 30 mins: CEO on device he uses to get 18-yr-old's body

Bryan Johnson, the 45-year-old tech CEO who spends $2 million annually to get the body of an 18-year-old, recently shared that he uses a fitness device that lets him do the "equivalent of 20,000 sit-ups in 30 minutes". Sharing a video of him using the device on Instagram, he said, "It feels like...it's pulling your entire stomach out...ripping it out."