Keep learning. Each time you try something new, you lay new connections between neurons and fend off neurological decline. Study a new language or just attempt a new recipe. If crosswords are old hat, time yourself; racing against the clock “forces your brain to think flexibly.”
Exercise. Aerobic workouts promote brain activity, but even “slow-and-steady” strength training seems to help, by boosting a neuron-nourishing protein.
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