#139 – Waking Up
Matt explains sleep inertia - the groggy transition to wakefulness - noting that waking is a process, not a switch, and that brain regions activate at different speeds. While the core wakes fast, the prefrontal cortex, which handles judgment, remains foggy for 15 minutes. This window can leave you more impaired than after an all-nighter.
He suggests a toolkit: use bright light, time caffeine for waking, and keep naps under 20 minutes. Matt also recommends melodic alarms and warns that the snooze button just results in deepening the fog. Crucially, he advises a 15-minute buffer before making big decisions to allow every brain system to fully restart.
Please note that Matt is not a medical doctor, and none of the content in this podcast should be considered medical advice in any way, shape, or form, nor prescriptive in any way.
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As always, if you have thoughts or feedback you’d like to share, please reach out to Matt:
Matt: Instagram @drmattwalker, X @sleepdiplomat,
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