Many people assume sleep should be automatic. You get tired, you go to bed, and you fall asleep. But for millions of people, it doesn’t work that way. Instead, bedtime becomes frustrating. You feel exhausted, but your mind stays alert. You wake up during the night. You start worrying about sleep itself.
According to Dr. Nathan Mascaro, Ph.D., ABPP, disrupted sleep usually comes down to two core systems: sleep pressure and sleep rhythm. Sleep pressure is your body’s natural “hunger” for sleep that builds throughout the day as you exert energy physically and mentally. Sleep rhythm is your body’s association between sleep and certain cues—like darkness, bedtime, and your sleeping environment. When either system becomes disrupted, sleep can suddenly feel much harder than it should.
Why Trying Harder to Sleep Often Backfires
One of the biggest misconceptions about sleep is that it can be forced.
“Control is a ‘gearing up’ response,” Dr. Mascaro explains. “Sleep is a ‘letting go’ response.”
When your brain shifts into problem-solving mode—checking the clock, calculating how many hours you have left, worrying about tomorrow—your nervous system becomes more activated instead of more relaxed. That alert state works directly against the body’s ability to fall asleep naturally.
This is why so many people feel “tired but wired” at night.
Dr. Mascaro says humans are essentially built to become alert quickly when something feels stressful or stimulating. In modern life, that can look like checking work emails before bed, scrolling social media, watching intense TV shows, or replaying today’s conversations in your head.
“All these things can trick your brain into thinking you’re in a situation that requires being somewhat wired and that requires some action,” he says.
What’s Happening In the Brain During Poor Sleep
Several important neurochemicals help regulate healthy sleep, including GABA, adenosine, and melatonin.
- GABA helps calm and relax the nervous system.
- Adenosine builds throughout the day and helps create sleep pressure.
- Melatonin helps regulate your circadian rhythm and signals that it’s time for sleep.
When daily habits work against these systems, sleep often suffers.
Sleep Variation Is More Normal Than You Think
One poor night of sleep can feel catastrophic, but variation in sleep is actually very normal.
Sleep commonly fluctuates by an hour to an hour and a half from night to night.
The problem is often how people respond to that variation. Sleeping late, skipping exercise, taking long naps, or becoming anxious about sleep can unintentionally create even more disruption the following night.
Instead of focusing on one bad night, it’s more helpful to look at sleep patterns over time. Most people naturally return to their baseline when they maintain healthy routines consistently.
The Most Important Place to Start: Exercise
When people ask where they should begin if they want to improve their sleep, Dr. Mascaro says he almost always starts with exercise.
Exercise helps build sleep pressure by increasing adenosine throughout the day. It also supports stress regulation, blood sugar balance, mood, and overall nervous system health.
Many people avoid exercise when they’re sleeping poorly because they already feel exhausted. But movement is often one of the most effective ways to restore healthy sleep rhythms over time.
“The main thing that happens is you’re more likely to get better sleep at night,” Dr. Mascaro says. “You wear yourself out. It causes that adenosine to build up in a way that builds the sleep pressure.”
Why Wake Time Matters More Than Bedtime
A consistent wake time is one of the most important habits for improving sleep.
Many people try to compensate for poor sleep by sleeping in. While understandable, that can further disrupt the body’s rhythm and reduce sleep pressure the next night.
Dr. Mascaro recommends choosing a wake time and sticking to it consistently—even after a rough night of sleep. That consistency helps retrain the body’s internal clock over time.
Small Habits That Can Make a Big Difference
Sometimes the biggest improvements come from surprisingly small changes.
Helpful strategies include:
- Avoiding clock-checking during the night
- Leaving the bed if you’ve been awake for 15–20 minutes
- Returning to bed only once you feel sleepy again
This approach helps prevent the brain from associating the bed with frustration, stress, and wakefulness.
“The longer you’re in bed not sleeping, tossing, turning, feeling frustrated, your brain’s going to generate this classically conditioned response of frustration,” Dr. Mascaro explains.
Creating a Wind-Down Routine That Actually Works
A healthy wind-down routine sends a clear signal to the brain and body that the day is ending.
For some people, that might mean:
- Taking a mindful walk
- Practicing meditation
- Journaling
- Planning for tomorrow
- Setting aside “worry time” earlier in the evening—a short period to process stressful thoughts or plan for tomorrow before trying to sleep.
The goal is to gradually transition from stimulation into relaxation.
Dr. Mascaro recommends making each evening activity slightly more relaxing than the one before it.
He also encourages people to be mindful about what they expose themselves to before bed—especially bright lights, stressful content, and activities that shift the brain back into work or problem-solving mode.
Rebuilding Trust With Sleep
One of the most important parts of improving sleep is reducing fear around sleep itself.
As people establish healthier routines, exercise consistently, get more sunlight, and reduce nighttime stimulation, many begin feeling better overall—even before sleep fully improves.
That reduced fear and pressure often allows sleep to improve more naturally.
Sleep responds best to consistency, rhythm, safety, and relaxation—not control or perfection.
And often, the most meaningful changes are also the simplest:
- Move your body regularly
- Keep a consistent wake time
- Reduce stimulation at night
- Create space to unwind
- Let go of trying to control sleep
Over time, the body often remembers how to do the rest.
About the Expert:
Dr. Nathan Mascaro, Ph.D., ABPP, is a board-certified clinical psychologist specializing in behavioral health, sleep, stress, and emotional wellness.
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Learn more about the Sleep Reset Course here.
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