Many people with ADHD find their bodies can’t slow down at night, even when their minds are tired. According to NHS guidance, this physical restlessness is more than just fidgeting, it reflects how ADHD affects arousal, movement, and the brain’s ability to switch off before sleep.
The restless body and racing brain
Research from Frontiers in Psychiatry shows that people with ADHD often experience hyperarousal, where the body stays in a state of alertness even at bedtime. This keeps heart rate and muscle activity higher than normal, delaying the onset of sleep.
Studies using EEG and actigraphy confirm that individuals with ADHD take longer to fall asleep and show more nighttime movement than those without the condition. Delayed melatonin release, linked to dopamine and circadian rhythm dysregulation, adds to the challenge by pushing the body’s natural “sleep clock” later.
The role of medication and daily habits
According to NICE guideline NG87, stimulant medication can sometimes extend wakefulness if taken too late in the day, although in many cases it actually improves sleep by reducing daytime hyperactivity and disorganisation.
Non-stimulant options such as atomoxetine may be considered if stimulant-related restlessness continues. As NHS specialists note, medication plans should always be reviewed individually to balance ADHD symptom control with sleep quality.
How to manage nighttime restlessness
Experts from Oxford CBT and NHS sources recommend a structured wind-down routine, consistent bedtimes, screen-free time, and calming physical or sensory activities that help signal to the body that it is time to rest.
Techniques such as CBT for insomnia (CBT-I), early-day exercise, and light therapy may also help reduce hyperarousal and support natural melatonin rhythms. For some individuals, melatonin supplements may be prescribed under GP supervision.
Private services like ADHD Certify can provide post-diagnostic reviews and help patients explore how restlessness and sleep interact within ADHD management plans.
The takeaway
Physical restlessness in ADHD isn’t just “too much energy.” It reflects underlying neurological and circadian differences that make it harder for the brain and body to power down. Structured routines, well-timed medication, and clinician-guided behavioural support can help turn restless nights into more restorative sleep.
