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Behaviors27 mentions

Cyclic Hyperventilation Breathwork

A short bout of deliberate fast, deep breathing followed by a breath hold, usually done seated or lying down and never near water or while driving. Common versions use about 25–30 forceful inhale-exhale cycles, sometimes repeated for a few rounds, then an exhale hold or full-lung hold. It’s used to spike sympathetic arousal and adrenaline, which can increase alertness and focus and may serve as a form of stress inoculation.

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So if you did that for 25 repetitions, 25 inhales and exhales, you would feel more alert. You'd also feel more warm.

Andrew Huberman · Control Your Brain Chemistry for Focus, Motivation & Well-Being | Huberman Lab Essentials · Aug 6, 2026 · 20:38 · YouTube ↗
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