#1 · Whoop
The endorsement here comes from Steven Bartlett, on Sleep Doctor: If You Wake Up At 3AM, DO NOT Do This! in 2026. That episode features Dr. Michael Breus, A clinical psychologist and sleep specialist of 26 years known as 'The Sleep Doctor.' He is one of only 168 people to pass the medical sleep boards without attending medical school, popularized the chronotype framework, and claims to have discovered a fourth chronotype (the dolphin). In total it earned 12 separate on-air endorsements across 3 different shows (Diary of a CEO, Joe Rogan, Tim Ferriss).
“I watched a video online where they compared all of the devices to the hospital grade stuff. and the Whoop 4 was the closest to the hospital grade.” — Steven Bartlett 01:49:10
