What is non-sleep deep rest? (NSDR)

Non-sleep deep rest (NSDR) is a deliberate practice of deep relaxation while staying awake—often lying still and following a guided body scan and slow, long-exhale breathing. Yoga nidra is a traditional form; meditation and hypnosis are also included under the broader NSDR umbrella. 1 2

• 1. Potential benefits: NSDR may restore mental and physical vigor, support focus and cognitive function, ease stress, and help with sleep. It may also support neuroplasticity and learning. 3 4
• 2. Learning: A study discussed in the episode found that a 20-minute NSDR session after about a 90-minute learning bout increased learning and retention. 5
• 3. Sleep and dopamine: NSDR may partly compensate for lost sleep, though it is not a replacement for adequate sleep. Research described in the episode found increased dopamine availability in the basal ganglia/striatum after yoga nidra or NSDR, which may support motivation and cognitive performance. 6 7