In this Portuguese‑language video, speaker Rodrigo Barros explains how habitual smartphone use—especially scrolling through negative news on social‑media platforms—disrupts sleep quality. He describes that social‑media apps are deliberately engineered to be highly dopaminergic, prompting users to keep checking posts, notifications, and messages. This constant engagement triggers massive releases of dopamine, noradrenaline and adrenaline, activating the brain’s autoprotection (fight‑or‑flight) circuitry. When users consume negative news before bedtime, the brain further ramps up vigilance, asking “how can I avoid this happening to me?” The combined neurochemical surge prevents the central nervous system from reaching the calm state required for restorative sleep, even if the person eventually falls asleep from exhaustion. The speaker concludes that using the phone right before sleep, especially for distressing content, undermines the physiological conditions needed for high‑quality rest.
