Lifestyle factors and daily habits leave the nervous system revved up with nowhere to go. "The good part," Agarwal said, "is those are a lot more easily corrected."

By Sara Goldstein
Updated Jul. 08, 2026

For many, the struggle to fall asleep is a nightly battle, often leading to a reliance on supplements or a cycle of frustration. However, a growing body of research and expert opinion suggests that the root cause of sleeplessness may not be a sleep disorder itself, but rather an overstimulated nervous system. Dr. Shilpi Agarwal, a board-certified family medicine physician and medical contributor, emphasizes that addressing lifestyle and daily habits can be more effective than traditional sleep aids for many individuals.

Understanding the Nervous System’s Role in Sleep

Dr. Agarwal posits that persistent sleep difficulties are often not indicative of a physiological sleep disorder like sleep apnea or narcolepsy, which are typically diagnosed through sleep studies and require specific medical interventions. Instead, she explains, "It isn’t a sleep disorder. It’s probably your nervous system needing help and a boost regulating, and then you’ll get to sleep easier."

This distinction is crucial. While a true sleep disorder is a medical condition requiring clinical diagnosis, issues stemming from an overactive nervous system are often linked to lifestyle choices and daily stressors. These factors can leave the body in a constant state of alertness, making it difficult to transition into restful sleep. The good news, according to Dr. Agarwal, is that these issues are often more readily corrected through targeted behavioral and environmental adjustments.

The Paradox of Trying Too Hard to Sleep

The common experience of lying in bed, wide awake, and desperately trying to force oneself to sleep is counterproductive, according to Dr. Agarwal. This is because the very act of worrying about not sleeping triggers a physiological stress response. "Your body views that perceived lack of sleep as a threat," she explains. This threat perception activates the sympathetic nervous system, releasing hormones like adrenaline and cortisol, which are designed to enhance alertness and focus, not induce drowsiness.

"Physiologically, your body is shooting out more hormones to help you be more focused," Dr. Agarwal states. "And you can’t get to deep sleep anymore because you’re so worried." The pressure to fall asleep quickly can therefore create a feedback loop, exacerbating the problem.

A Simple, Yet Powerful, Mindset Shift

Dr. Agarwal’s first recommendation is remarkably simple and costs nothing: adopt an "So what?" attitude towards sleeplessness. The immense pressure individuals place on themselves to fall asleep immediately can be a significant barrier. By reframing wakefulness not as a catastrophe but as an acceptable, albeit temporary, state, the anxiety surrounding sleep can be reduced.

"It’s not a catastrophe if you don’t fall asleep right away," Dr. Agarwal advises. "We put so much pressure on ourselves to fall asleep right then and there. Just say it’s okay, I’ll get to sleep when I get to sleep." This shift in perspective helps to disarm the body’s threat response and allows for a more relaxed approach to bedtime.

Proven Techniques for Calming the Overstimulated Nervous System

When a simple mindset shift isn’t enough, Dr. Agarwal offers two practical techniques she prescribes to patients and utilizes herself. These methods are designed to actively engage the mind in a low-stress activity, diverting attention from worries and promoting relaxation.

Box Breathing for Nervous System Regulation

Box breathing, also known as Sama Vritti pranayama, is a powerful tool for regulating the nervous system. The technique involves a four-step, equal-count breath pattern. Participants visualize a box and inhale deeply along one side, hold their breath across the top, exhale slowly down the opposite side, and hold their breath again along the bottom.

Dr. Agarwal suggests completing 10 to 12 rounds. The key to its effectiveness lies in the required focus. "You really have to focus on your breath, which is hard. But that’s the point," she notes. This intense focus on a simple, rhythmic action can effectively interrupt the cycle of anxious thoughts and promote a sense of calm. Research has shown that controlled breathing techniques can reduce heart rate, lower blood pressure, and decrease levels of stress hormones, all contributing to a more conducive state for sleep.

The Backward Day Recap: A Cognitive Diversion

Perhaps the most intriguing of Dr. Agarwal’s techniques is the backward day recap. This method involves recalling the events of the day in reverse chronological order, starting from the present moment and working backward to breakfast. For example, one might begin by thinking, "I just got out of the shower, I did my skincare routine…" and then proceed to remember what they ate for dinner, what happened after work, and so on, all the way back to their morning meal.

"It’s a low-stress way to recap something your brain already knows," Dr. Agarwal explains. "It’s almost boring, but you have to focus on it." The effectiveness of this technique stems from its ability to engage the brain in a familiar, non-threatening task. Unlike planning for the future or dwelling on past worries, recounting past events requires memory recall without the associated emotional load. The predictable nature of past events also prevents the mind from spiraling into anxious rumination. Dr. Agarwal notes that "Most people fall asleep before they get to breakfast." This technique leverages the brain’s natural tendency to wind down when presented with a mundane yet engaging mental activity.

The Role of Supplements and Morning Sunlight

While Dr. Agarwal generally advises against a heavy reliance on sleep supplements, she makes a notable exception for magnesium glycinate. "I really think magnesium glycinate is wonderful. Everyone should be taking it," she states. Magnesium plays a vital role in numerous bodily functions, including muscle relaxation and neurotransmitter regulation. Magnesium glycinate, in particular, is known for its calming properties and good absorption rate. "It truly relaxes your muscles," Dr. Agarwal adds. She cautions against excessive intake, as it can lead to gastrointestinal distress.

Beyond nighttime routines, Dr. Agarwal highlights the profound impact of morning sunlight on sleep regulation. Exposure to bright light shortly after waking helps to set the body’s internal clock, or circadian rhythm. This signals the brain to suppress melatonin production during the day and prepare for its release at the appropriate time in the evening. "Skip it, and your body doesn’t secrete melatonin until much later in the day," she warns, which can contribute to delayed sleep onset. Even indirect exposure, like having coffee by an open window, can be beneficial, especially for those in regions with less natural light.

Realistic Strategies for Evening Routines

Dr. Agarwal advocates for practical, achievable strategies rather than stringent, often unsustainable, rules. When it comes to technology, she acknowledges that completely disconnecting from devices is unrealistic for most. Instead, she suggests "flipping the phone face-down, setting a nightly get-off-your-phone alarm, [and] graying out your apps after a certain hour." For children, however, she adheres to the American Academy of Pediatrics’ recommendation of no devices in the bedroom.

A critical rule for winding down involves deferring significant decisions until the morning. "The night should be preserved for recovery, restoration, and optimistic thinking for the next day," she emphasizes. Engaging in analytical thought processes late at night can stimulate the brain and hinder sleep.

Her daytime recommendations are equally practical:

• Regular Exercise: Aim for physical activity, but avoid intense workouts close to bedtime.
• Limit Caffeine: Steer clear of caffeine in the afternoon and evening.
• Protein-Heavy Dinners: Opt for meals that stabilize blood sugar, preventing disruptive spikes and crashes before sleep.
• Establish a Wind-Down Window: If the goal is to be asleep by 10 p.m., aim to be in bed by 9 p.m. This hour should be dedicated to "non-digital things" like reading a physical book or journaling.

By focusing on regulating the nervous system through mindful daily habits and adopting a less anxious approach to sleep, individuals can significantly improve their ability to fall asleep and achieve more restorative rest.