NSDR, short for non-sleep deep rest, is a name popularised by Andrew Huberman for practices such as yoga
nidra and guided body scans: you lie still and let the body rest deeply while the mind stays awake. The
research is still early. One PET study found increased dopamine release during yoga nidra (Kjaer et al.,
2002).
Short naps are better studied. In NASA's pilot study, a planned nap of about 26 minutes improved alertness
and performance (Rosekind et al., 1995), and a sleep-lab study found that a 10-minute nap gave the best
balance of alertness and grogginess (Brooks & Lack, 2006). Power nap covers that range, 10 to 25 minutes.
What sets these sessions apart is the way back. Nap music slows you down and stops there. Power nap and Body
at rest slow the pulse from alpha into theta, hold it there for the rest itself, then climb back up, the
tone brightening as they go. And when the day is over, Nightfall takes you all the way down into sleep.
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Power nap
Down into theta, back up into beta
You wake up alert
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Body at rest
Down into theta, back to alpha
Rested, but awake
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Nightfall
Down through theta into delta
Toward sleep
6th Mind is a wellbeing tool, not a medical device.