Does it still work if I fall asleep?
Then you have slept, and that is no bad thing in itself. But keep it short: if you drop off for more than half an hour during a session, you really do eat into your sleep pressure.
NSDR — non-sleep deep rest — and Yoga Nidra are guided protocols that bring you into a deeply relaxed, half-waking state. They restore focus, lower stress and make falling asleep easier, without your actually having to fall asleep. Ten to twenty minutes is enough.
Yoga Nidra, yogic sleep, is a centuries-old technique; NSDR is the modern, brand-neutral term popularised by neuroscientist Andrew Huberman. In both you follow a spoken guidance of body scan and breathing that brings your brain waves towards the threshold of sleep.
You stay just awake enough to be conscious, but relaxed deeply enough to reset your nervous system.
A long afternoon sleep eats into your sleep pressure and makes falling asleep in the evening harder. NSDR doesn't, because you don't enter sleep. You get the recovery without the bill in the evening.
That makes it particularly suited to the afternoon part of a stay: you come to rest, and your night stays intact for what actually matters.
Then you have slept, and that is no bad thing in itself. But keep it short: if you drop off for more than half an hour during a session, you really do eat into your sleep pressure.
Meditation trains attention, usually seated and awake. NSDR aims instead at maximum relaxation lying down, towards the threshold of sleep. It takes less practice than meditation and works for almost everyone straight away.