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Physiological Sigh Sleep Onset
Physiological sigh sleep onset uses one to three double-inhale, long-exhale cycles in dim light to blunt mind racing— a bridge tool, not a full sleep hygiene plan.
Physiological sigh sleep onset uses one to three double-inhale-through-nose, long-exhale-through-mouth cycles in dim light when mind racing blocks sleep. The pattern rapidly offloads carbon dioxide and lowers acute arousal in lab settings—faster than scrolling for some people.
It is a bridge tool, not a replacement for caffeine cutoff, cool room, or consistent wake time. Stop if lightheaded; return to normal breathing.
Practice once daily when calm so the motor pattern is familiar at night.
Common questions
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How many physiological sighs before sleep?
One to three cycles is a common starting range. If arousal stays high, pair with body scan or four-seven-eight instead of stacking dozens of sighs.
Related terms
Put Physiological Sigh Sleep Onset into practice
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