08/10/2026
Apparently, sleep consistency is more important than duration?
Okay, the research carried out was solid. Around 60,000 UK adults wore wrist trackers for a week, and over the next six years, how regular their sleep was predicted early death slightly better than how long they slept.
*Slightly* being the key word.
It was a modest margin, and it shows a link, rather than proof that you can focus on consistency and ignore duration. So consistency deserves a place in your routine, but it just doesn’t get to replace your need for hours.
My problem with the headline is that most of us aren’t choosing between the two, because we’re missing both. In a study tracking 67,000 adults over nine months, only 15% slept 7 to 9 hours on at least five nights a week. We go to bed at random times and we cut the night short.
You can go to bed at 11 and up at 6 every single day, thinking that’s 7 hours - but look..
That’s 7 hours in bed, not 7 hours asleep. Sub the time it takes to drop off, the 3am toilet trip and the tossing and turning, and you’re closer to six.
And if you’re ‘consistently’ sleeping from midnight to 5am, you’re consistently under-slept. It’s regular, and it’s still not enough.
The people who do best have *both*. In another study, adults sleeping about 7 hours on a regular schedule had a 39% lower risk of early death than irregular sleepers averaging under 6 hours.
Slide 9 is a week of my own WHOOP data where I nailed both. I kept my bed and wake times regular and averaged 8 hours 21 minutes asleep against a sleep need of 8 hours 10.
0 sleep debt meant recovery averaged 81% for the week, up from 63% over the previous 30 days. Now I know 1 week of my data proves nothing on its own, but it’s a good picture of what the research points to.
So first things first, get 7 or more hours of actual sleep, which for most of us means around 8 hours in bed. Then consistency: the same bedtime and wake time, weekends included. Foundations first, then the fine-tuning.
If you want help building that into your week, DM or comment PERFORM for a free trial of the Perform For Life app.