Wellness culture has given us cold plunges, mouth taping, and supplements that cost more than a car payment. The latest entry is considerably less miserable. And all you need to do is give your pinky a little wiggle.

“Pinky time” started with a TikTok from creator Daniela Paez-Pumar, who films herself and friends running through a quick finger sequence every night at 7:45 p.m.—middle and pointer fingers wrapped together, ring fingers touching thumbs, pinkies moving up and down for a few seconds. The premise is that doing this daily can help slow cognitive decline. She paired the video with the caption: “No one is exempt from pinky time — we keep that brain HEALTHY.”

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She’s not entirely wrong, though the science behind it deserves a little unpacking. Dr.…