Bryan Johnson· Author
Consistency and predictability allow the nervous system to remain in an embodied, parasympathetic state. Sudden changes in speed or pressure increase cognitive monitoring and sensory vigilance, which can interrupt arousal.
The headline is broadly defensible, but the qualifications matter. Effect sizes vary by population, the strongest claims rest on shorter trials, and credible voices push back on how it's typically framed.
Consistency and predictability allow the nervous system to remain in an embodied, parasympathetic state. Sudden changes in speed or pressure increase cognitive monitoring and sensory vigilance, which can interrupt arousal.
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Consistency and predictability allow the nervous system to remain in an embodied, parasympathetic state. Sudden changes in speed or pressure increase cognitive monitoring and sensory vigilance, which can interrupt arousal. Research on sexual excitation–inhibition shows that stable stimulation supports sustained genital response, while erratic input shifts attention back to evaluation.