If you read the burnout issue a few weeks ago, this is its sleep-specific sibling.
In 2011, Cheri Mah and colleagues at Stanford asked the men's basketball team to extend their sleep to ten hours a night for five to seven weeks. Free-throw accuracy improved by nine percent, and three-point accuracy improved by the same margin. Sprint times fell, reaction times improved, and the players reported better mood and less daytime fatigue. Their training stayed the same. Only their sleep changed.
Five years later, Christopher Barnes and colleagues at the University of Washington ran a version of the same question on leaders. Sleep-deprived leaders were rated less charismatic by the people they led. In a second study, sleep-deprived followers rated leaders as less charismatic regardless of how the leader had slept. Charisma, on that evidence, is partly a measure of how much sleep is in the room.
This issue covers why executives who know all of this still run on six hours, why the fix is rarely more time in bed, and ends with a five-minute close I use with clients.
Why I'm writing this
Sleep was the first thing my clinical training reframed for me. In cognitive-behavioral hypnotherapy, sleep sits inside recovery, and recovery is treated as a regulation problem rather than a time problem. Hours in bed are the wrong question. The useful one is if the system that ran the day has been told the day is over. In most high performers it has not, and the body is in a resting position while the mind keeps running.
A senior executive I worked with, in a sustained high-pressure role at a global sports brand, arrived running on stress, stimulants, and caffeine. The first work was what I would call "the close": structured practices and self-hypnosis built specifically around the end of the day. Sleep improved first. The caffeine and stimulants faded on their own once the exhaustion they were covering for had gone. The board room came last. Meetings that used to cost a night's sleep beforehand and an hour of replaying afterward became meetings: prepared for, run, finished. Composure that had taken effort to produce was there without being produced.
The mechanism
Sleep rebuilds the prefrontal cortex. That is the region that makes decisions, holds context across a meeting, reads a room, and regulates emotion. It is also the region that judges how well you are functioning. Keep sleep at six hours, and two things happen at once. It performs worse, and it becomes less able to notice that it performs worse. Executives who say they feel fine on six hours are reporting the second effect.
The 2026 numbers describe the population this produces. BCG's CEO Insomnia Index surveyed 500 chief executives in January on pressure and decision capacity - the finding was that sleep loss took their judgement of sleep loss. Vistage's second-quarterindex found 70 percent of CEOs experiencing burnout at least occasionally and 28 percent frequently or daily. These leaders have all the information about sleep they will ever need.
The missing piece is a way to make the system stand down at 11 p.m.
Why more time in bed misses
The usual prescription is more hours. It fails for a specific reason. The mind arrives in bed still running the operating model of the day, and no quantity of bedtime closes loops that were never closed. Sleep architecture stays shallow, the deeper stages that do the rebuilding get cut short, and the executive wakes after eight hours exactly as tired as after six. Mah's basketball players had a coach telling them practice was over. Executives have to tell themselves.
The Close: five minutes before sleep
Run this every night during high-pressure stretches. Sitting up, lights low, before you lie down.
1. Mark the end (one minute). Out loud, name what is over. "The board meeting is done." "The launch week is done." The verbal version does something the silent version can't - the system registers spoken closure.
2. Three lines (one minute). On paper, not a screen. The hardest decision of the day. One thing you would do differently. The single most important thing for tomorrow. Then close the notebook. Unfinished tasks keep consuming resources until they are acknowledged, and three lines is enough acknowledgment.
3. Three breaths (one minute). Four counts in, six counts out. This is a downshift of one notch. It prepares the system to receive the next step.
4. The permission sentence (one minute). Under your breath: "I have permission to stop running this. The work continues without me holding it." Three repetitions. This is a direct instruction to the part of the system that is still on duty.
5. Descend (one minute). Lie down. Attention travels from the forehead to the feet, slowly, releasing each region as it passes. Most clients are asleep before it reaches the knees.
In session, "the close" is installed under hypnosis and paired with a personalized audio, which is why clients tend to report a change within the first week. The paper version works more slowly, but it still works.
The takeaway
Sleep is the one performance intervention with a nine-percent result and no side effects, and the executives who need it most are the ones whose judgment of their own need is impaired by the lack of it. The fix is a close, five minutes long, that tells the system the day is over. The day has to end before the night can start.
Before you go. The Pre-Performance Reset is a free 10-minute audio protocol built on the same clinical methods as this issue. I made it for the moments before the moment, and clients use it just as often to close a day.
You can find it here (for free): nicolasullah.com/free-audio
A single, carefully chosen idea on mental discipline under pressure — delivered to your inbox every Sunday morning. Written by a CBH practitioner with an MSc in Psychology who works with elite athletes.
