NSDR (Non-Sleep Deep Rest): What the Trials Show and How to Do It

NSDR (non-sleep deep rest) is a 10- to 20-minute guided practice of lying still, breathing slowly and moving attention through the body. In two randomized trials, a single 10-minute session reduced sleepiness, fatigue and stress compared with sitting quietly, and briefly sped up reaction times. It is a promising rest break, not a replacement for sleep. This page is not medical advice.

Not medical advice. If you are persistently exhausted or cannot sleep, talk to a clinician rather than relying on rest practices.

What NSDR is

NSDR is a label Andrew Huberman popularised on the Huberman Lab podcast for practices adapted from yoga nidra, a guided meditation done lying down. A typical script asks you to lie on your back, take a few long exhales, and then move attention slowly through the body. Unlike yoga nidra, NSDR scripts usually drop the spiritual framing.

What the NSDR trials found

The 2026 trial is the more useful one because it tracked effects over time. Its authors concluded that NSDR “was associated with consistent improvements in perceptual outcomes, while cognitive findings were transient and physiological findings were modest.” Heart rate fell more during NSDR than in the control group. Grip strength and jump height were also measured, and participants were retested immediately, 20 minutes and 40 minutes after the session; the reaction-time benefit was seen only at the first test, while the improvements in how rested people felt were more consistent.

In the 2024 trial, 34 people did NSDR and 31 sat passively, and the NSDR group improved more on grip strength, reaction time on a vigilance test and accuracy on a Simon task, measured 10 minutes later. Both trials used young, physically active volunteers and a single session, so they say little about daily practice or other groups.

The yoga nidra evidence

• Daily practice: In a 2025 randomized trial, adults practised 11 or 30 minutes of online yoga nidra daily for 2 months. The 11-minute group improved compared with a waitlist, but effect sizes were small (d = 0.08-0.16), and the short form reduced depression scores slightly compared with a music control (d = 0.13). Regular practice was associated with lower total cortisol, and the 30-minute version produced somewhat larger effects than the 11-minute one when each was compared with the control groups.
• The broader literature: An integrative review of 29 studies, 12 of them randomized trials, found yoga nidra effective in most, but noted wide variation in samples and session lengths and called for larger, stronger studies.

NSDR vs a nap

If you are actually short on sleep, a brief nap has stronger evidence. In a 2006 lab study, 24 healthy young adults slept about 5 hours at night and then took afternoon naps of 5, 10, 20 or 30 minutes, or no nap. The 10-minute nap produced immediate improvements in sleepiness, fatigue, vigor and cognitive performance, with some benefits lasting as long as 155 minutes. The 30-minute nap caused a period of grogginess first. By comparison, the reaction-time benefit in the 2026 NSDR trial was seen only immediately after the session.

So NSDR and naps do different jobs. NSDR is a rest and calming practice that people can do without falling asleep, at a desk-friendly length. A short nap is the better-tested option when sleepiness is the problem. See how to nap effectively for timing.

Quiet rest after learning

NSDR is often recommended as a break after a learning session. NSDR itself has not been tested for that, but quiet rest has. In two experiments, people heard two stories; one was followed by 10 minutes of wakeful resting and the other by 10 minutes of a spot-the-difference game. Memory for the rested-after story was better 15 to 30 minutes later and still better after 7 days.

Rest also seems to matter within a practice session. In a 2019 skill-learning study, performance barely changed during short bouts of practice, but improved during the rest periods in between, and these offline gains accounted for early learning. A 2019 review concluded that “moments of unoccupied rest may serve an essential cognitive function.” The key word is unoccupied: scrolling on your phone is not rest in this sense.

These studies support quiet breaks after learning. Whether NSDR works better than simply sitting with your eyes closed is unknown.

The dopamine claim

A widely repeated claim is that NSDR raises dopamine by 65%. It comes from a 2002 PET study of yoga nidra meditation. Tracer binding in the ventral striatum fell by 7.9% during meditation, which the authors calculated as a 65% increase in endogenous dopamine release. It was a small study of yoga nidra, not NSDR, and has not been replicated in NSDR trials. It is interesting physiology, not evidence that NSDR boosts motivation.

How to do it

1. Lie on your back somewhere quiet, eyes closed.
2. Take a few slow breaths with a longer exhale; the physiological sigh guide covers exhale-focused breathing.
3. Follow a 10- to 20-minute audio script that moves attention through the body.
4. If you fall asleep, that is fine; if you need actual sleep, see how to nap effectively.
5. Sit up slowly and give yourself a few minutes before demanding work.

The 10-minute session length matches the NSDR trials. Longer scripts are common, but there is no evidence yet that longer is better for NSDR specifically.

When to use it

• Midday dip: As a rest break when a nap is not possible; the 2024 trial tested a single daytime session.
• After intense learning or work: A quiet break; wakeful rest after learning helped memory in lab studies. For more on spacing work and breaks, see 90-minute focus sessions.
• As part of a daily practice: If you want a regular habit, brief daily meditation has more trial data on attention.

For the wider toolkit, see the focus and cognition guide.

Limits of the evidence

The direct NSDR trials are small, single-session, and in active young adults. Participants knew whether they were resting or not, so expectation effects are likely. Claims that NSDR restores dopamine, replaces sleep or accelerates learning are not established.