July 28, 2025, 6:01 pm | Read time: 6 minutes

What Is Non-Sleep Deep Rest?

Deep rest without sleep? That’s exactly what NSDR encapsulates. NSDR is a collection of mindfulness practices that lead to a deep state of relaxation. These techniques put the body in a state where heart rate, brain waves, and stress hormones are significantly reduced. Without actually sleeping, the brain enters a regenerative mode similar to early sleep phases.

The term was coined by neuroscientist and Stanford University School of Medicine professor Andrew Huberman. NSDR became known as a practical, scientifically backed method for mental recovery through Huberman’s podcast “Huberman Lab.” His goal is to bring people profound relaxation without spiritual overtones—but with measurable benefits for focus, stress reduction, and cognitive performance.

NSDR helps reduce mental exhaustion, improve concentration, and sustainably calm the nervous system. Especially during stressful periods or after intense cognitive strain, NSDR can act as a short but effective reset without needing to fall asleep.

Among others, Google CEO Sundar Pichai relies on NSDR to find calm in a hectic daily routine. In an interview with the Wall Street Journal, he explained that traditional meditation is challenging for him—instead, he regularly turns to guided NSDR videos on YouTube. Depending on his needs, he chooses formats of ten, twenty, or thirty minutes. Inspired by neuroscientist Andrew Huberman’s insights, Pichai uses NSDR specifically for mental relaxation and recovery.¹

Applications of Non-Sleep Deep Rest

Midday Energy Boost

NSDR can be an effective way to recharge energy reserves at midday without caffeine or a power nap. Often, power naps leave you feeling more exhausted afterward or make it difficult to fall asleep at night. Neither is the case with a ten- to thirty-minute NSDR session. Dopamine levels are replenished, and cortisol levels are reduced, resulting in an optimal mental state between alertness and calm.²

Enhancing Learning and Memory

However, NSDR can not only serve relaxation but also specifically enhance learning and memory performance. According to Huberman, an NSDR session after learning can help better embed new information in memory—similar to what happens during sleep, but in a shorter time. During these deep rest phases, the brain replays certain processes that were active during learning. This process is known as “neural replay.”

Reducing Stress and Anxiety

Since Yoga Nidra is a central component of NSDR, study findings can also be excellently applied to NSDR. In a quasi-experimental study with 49 participants with high blood pressure, it was shown that regular Yoga Nidra exercises can significantly reduce stress perception. The participants completed twelve sessions of about 15 to 20 minutes over two weeks. Their stress perception was measured with the Perceived Stress Scale (PSS), a questionnaire for assessing subjective stress perception over the last four weeks.³ The average PSS score dropped from 25.57 to 20.55 points—a decrease of about 20 percent, which was statistically highly significant. At the same time, blood pressure values also improved.⁴

Just knowing that NSDR provides a simple, universally applicable tool for relaxation can have a calming effect. It helps to avoid or mitigate so-called meta-anxiety, the fear of fear. NSDR can be performed not only lying down but also sitting.

For Falling Asleep and Waking Up

As the day winds down and fatigue and drowsiness set in, it’s mainly due to the increasing release of neurotransmitters adenosine and melatonin. They signal the body that it’s time to rest. However, this natural process is often disrupted by inner restlessness, racing thoughts, or stress. An NSDR session in the evening can help release these mental tensions and promote deeper relaxation.

And as the evening gently transitions into night, each new morning begins—an opportunity to start the day fresh and invigorated. But if stress, inner restlessness, and racing thoughts from the previous day are carried into the night, nighttime recovery often falls short of expectations. In such cases, an NSDR session in the morning can be helpful: While lost sleep cannot be fully recovered, NSDR offers the nervous system a deep form of regeneration and can help gain new energy and focus.

More on the topic

"Yogic Sleep" A Few Minutes of Yoga Nidra Can Boost Sleep and Performance

From Hatha to Vinyasa How Various Yoga Styles Differ

The Components

NSDR works like a modular system. Depending on the need, individual elements can be combined or removed.

Progressive Muscle Relaxation/Body Scans

The entry into NSDR often begins with a so-called body scan: You direct your attention piece by piece through the body—from the crown to the toes—and consciously let go. Tensions dissolve, and breathing becomes calmer.

Progressive muscle relaxation takes it a step further: Instead of just mindfully perceiving the body, individual muscle groups are deliberately tensed for a few seconds and then consciously released.

Breath Regulation

Targeted breathing techniques, slow, even breathing with a focus on exhalation, calm the nervous system. Conscious breathing lowers heart rate, centers the mind, and reduces stress reactions in the body.

Guided Attention

A guided meditation in the form of a video or podcast can be helpful to direct attention, for example, to breathing, certain body sensations, or an inner journey. The goal is to reduce “mental noise” and interrupt ruminations without actively thinking.

Temporal Flexibility

NSDR can be integrated into daily life with great temporal flexibility. A session can last between ten and sixty minutes, depending on the need. This makes it possible to apply almost anywhere: whether in the office, at home, or even in the car during a break.

Meditative States/Yoga Nidra

Yoga Nidra, also known as “yogic sleep,” is a guided deep relaxation where the body and mind are placed in a state between sleep and wakefulness. The practice originates from traditional yoga teachings but is increasingly used in modern science and healthcare.

Distinction from Yoga Nidra

NSDR can be seen as an overarching term for a range of practices, including, and as a central component, Yoga Nidra. However, Yoga Nidra follows a fixed pattern: a guided meditation conducted lying down. NSDR, on the other hand, is more adaptable and flexible. By combining it with other elements such as specific breathing exercises or visualization techniques, NSDR can also be understood as an extension of Yoga Nidra.

Unlike Yoga Nidra, NSDR does not follow a spiritual or philosophical concept. Its foundation is the neuroscientific benefit. Additionally, the choice of terminology ensures that the entry into these techniques is as low-threshold as possible, as NSDR might be significantly more attractive to people who are put off by esoteric or religiously charged terms.