That’s what to miss about the Zeo website. They provided great reference material. From Zeo and elsewhere, “typical” deep sleep comprises about 21% of sleep in those adults in their 20’s and declines steadily to less than 10% in people aged 70 and older. Or stated another way, about an hour and half in young adults to less than 30 minutes in the elderly. REM remains relatively constant with age at about 22% or about an hour and half declining to a little more than an hour with age. According to Zeo*, “typical” for someone in their 30’s would be 7.1 hours total sleep, with 1.5 hours REM, 69 minutes Deep, interspersed by 21 minutes wake. Zeo’s average ZQ for a 30 something is around 80.
*“How does my Sleep Compare”, provided by Zeo with bedside model