Yoga Nidra Power Nap. Today’s 20 minute Yoga Nidra is designed for when you need to restore a sleep deficit. You might have awoken and need a wee bit more time to rest and restore, intentionally, or you might need a wee pick up me up mid-afternoon. Studies have shown that roughly 1 hour of Yoga Nidra is equal to four hours of sleep, so this Yoga Nidra is your space to inject more energy into your day whilst taking time for stillness and slowing down.