Why is it so hard to wake up with ADHD? Plenty of adults with ADHD describe the same morning: three alarms, a snooze button pressed without memory of pressing it, and a first hour spent in a fog that coffee barely touches. For years this was shrugged off as laziness or poor discipline.
A new study suggests it deserves more attention. Researchers presenting at SLEEP 2026 found that sleep inertia, the heavy, confused feeling straight after waking, was more strongly tied to adult ADHD than any other sleep complaint they looked at.
The finding has spread quickly online, often with extra claims attached. Here is what the research actually found, what it did not, and what tends to help.
What is sleep inertia
Sleep inertia is the short spell of grogginess, slow thinking, and poor coordination that follows waking. Everyone has it to some degree. It is usually worse when you are woken from deep sleep or when you are short of sleep, and for most people it fades within about half an hour. Psychreg covered the topic when a viral TikTok video raised awareness of sleep inertia.
Brain imaging helps explain the feeling. In a PET study of the waking brain published in Brain, Thomas Balkin and colleagues found that blood flow returned quickly to deep structures such as the brainstem and thalamus, which brings back basic awareness. Blood flow to the prefrontal cortex, the area behind planning and focus, rose more slowly over the following 15 minutes or so. That lag happened in healthy volunteers, which is why almost anyone can feel awake but not yet able to think clearly.
What the new study found
The research comes from Maurice Ohayon, Maxime Duhoux, and Mathilde Cote, and was published as a conference abstract in the SLEEP 2026 supplement. That matters, because an abstract is a short summary that has not been through the full peer review of a journal article, and the complete results are not yet available.
The team interviewed a representative sample of US adults twice, about three years apart: 15,929 people at the first wave and 10,931 at the second. ADHD was assessed against DSM-5 criteria. About 5.7% met the criteria at the first interview and 4.5% at the second.
- Sleep inertia stood out: Of all the sleep and wake symptoms examined, sleep inertia showed the largest association with ADHD, with an odds ratio of 4.63.
- It also predicted persistence: People who reported sleep inertia at the first interview were more likely to still meet ADHD criteria three years later (odds ratio 5.68).
- Fatigue mattered too: Severe fatigue was also strongly linked with both ADHD and its persistence.
An odds ratio describes how much more common something is in one group than another. It does not show that sleep inertia causes ADHD, or the reverse. The authors suggest that ADHD in adults involves problems with arousal regulation, the system that moves the brain between sleep and alertness, and not only problems with attention.
What the study did not show
Posts sharing the study often say that ADHD brains take 60 minutes longer to restore prefrontal blood flow and dopamine after waking. The abstract does not report that. It was a survey study, not a brain scan, and it did not measure blood flow, dopamine, or how many minutes it took anyone to wake up.
The slow return of prefrontal activity comes from the Balkin study, which looked at people without ADHD. Linking the two is a reasonable question for future research, but at present it is speculation. It is worth being wary of any precise figure attached to this finding.
Other reasons mornings can be hard
Sleep inertia is only one part of the picture. Several other things can make waking up difficult, and they often overlap with ADHD.
- A later body clock: In a study of adults with ADHD and sleep-onset insomnia in Biological Psychiatry, Maaike Van Veen and colleagues found that those who struggled to fall asleep released melatonin later in the evening and had a later start and end to their sleep than healthy controls. If your body clock runs late, a 7am alarm can land in the middle of your biological night.
- Not enough sleep: Going to bed late and getting up early for work or school deepens sleep inertia, and ADHD can make it harder to wind down at night.
- Sleep apnoea: Loud snoring, gasping, or pauses in breathing at night can leave you exhausted however long you sleep. The NHS guide to sleep apnoea lists waking up a lot and feeling very sleepy during the day among the signs.
- Irregular sleep times: Lying in late at weekends shifts the body clock, and sleeping longer can sometimes leave you feeling more tired.
Practical steps that may help
There is no single fix, but these steps are supported by sleep research and NHS advice.
- Keep the same wake time: A fixed wake time, including at weekends, helps anchor a body clock that tends to drift later.
- Get light early: Open the curtains or go outside soon after waking. Morning light helps shift a late body clock earlier.
- Dim the evening: Bright screens late at night can push sleep later. The NHS page on ADHD in adults recommends a regular bedtime, a quiet dark bedroom, and avoiding screens, caffeine, and alcohol close to bedtime.
- Skip the snooze cycle: Repeatedly drifting back to sleep for a few minutes can leave you groggier. Set one alarm for the time you actually need to get up.
- Build in a buffer: If you know your brain takes a while to start, plan an easy first 20 to 30 minutes rather than scheduling demanding tasks straight away.
- Talk to your prescriber: If you take ADHD medication, the timing of doses can affect both sleep and mornings. Do not change it without advice.
Psychreg has more ideas in its tips for improving sleep if you have ADHD.
When to see a GP
Struggling to get up now and then is normal. If mornings are seriously affecting your work, studies, relationships, or safety, for example if you are often late or feel too drowsy to drive, it is worth speaking to a GP. They can look at possible causes such as sleep apnoea, low mood, or medication effects, and refer you for a sleep or ADHD assessment if needed. This article cannot diagnose ADHD or a sleep disorder.
FAQs
- Why is it so hard to wake up with ADHD? A 2026 conference abstract found that adults with ADHD were much more likely to report sleep inertia, the groggy state after waking. A later body clock, short sleep, and conditions such as sleep apnoea may add to the problem, so mornings can feel far harder than they do for other people.
- Do ADHD brains take 60 minutes longer to wake up? That figure is not in the study. The research was a survey and did not measure brain blood flow, dopamine, or waking time.
- Is sleep inertia a sign of ADHD? Not on its own. Everyone has some sleep inertia, and many things can make it worse. Only a proper assessment can diagnose ADHD.
- What helps with sleep inertia? A regular wake time, morning light, enough sleep, avoiding repeated snoozing, and an easy start to the day can all help.
