Reviewed by Alicia Bigelow, ND Key Takeaways Non-sleep deep rest (NSDR), rooted in yoga nidra, is a practice of deep rest ...

Deep sleep is one of the most essential stages of the sleep cycle, playing a vital role in how well you feel both physically and mentally. Often referred to as slow-wave sleep or delta sleep, this ...

Not every dream is pleasant; many are disconcerting or even terrifying. Unpleasant dreams—particularly those that are frightening or deeply upsetting—are referred to as “nightmares,” and are ...