Also known as: non-sleep deep rest, yoga nidra, NSDR
Latest evidence update: 2026-04-30
Strongest in Consistency (95). Held back by Sample size (68).
Solid mix of RCTs with some methodological gaps.
Good cross-study replication, some imprecision.
Thousands of participants across the literature.
Studies agree on direction of effect.
Most studies are recent (last 2-3 years).
No per-outcome numbers yet for this one. Each finding's direction and strength is shown in the research below.
Areas where research points to a consistent direction of effect. The strength of evidence is graded; the size of the effect is not quantified.
Guided relaxation protocol that promotes deep rest without sleep. Shown to restore dopamine levels and enhance learning.
ProtocolEngine provides general health information based on published research. This is not medical advice. Consult a healthcare professional before starting any supplement or health protocol.
Yoga Nidra practice is associated with significant improvements in heart rate variability low to high frequency ratio compared to active control groups.
Progressive muscle relaxation effectively improves postoperative sleep quality with 35.2% probability of being the optimal intervention.
Progressive Muscle Relaxation improves sleep quality in adults.
Yoga Nidra reduces depression symptoms compared to no comparator with a moderate effect size.
Progressive muscle relaxation increased offspring birth weight by 165 grams in subgroup analysis.