Having recently returned to ballet classes after a two-decade hiatus, I feel defeated by the instructed footwork. I’m returning to the discipline to stave off the dementia that runs in my family. Dance hits on a few components—replication, recall, and creation—that make it especially relevant for preventing cognitive aging. “In ballet class, I know what to expect: first, pliés, then tendus—something I've been doing my whole life. This, plus name tags, would be a useful addition to all dance classes, I think.