HEALTHSPAN The neuroscience of cognitive reserve says the brain you’ll think with at eighty is being built right now by something most high-performers are accidentally avoiding. Press enter or click to view image in full size The choices you make in midlife shape the brain you will live with later — growth, movement, and learning are long-term investments in cognitive resilience./ Author created image using AI For forty-three years, I lived in the world of higher education administration. I was rewarded for what I knew, for my “expert” status, and for my ability to navigate complex organizational structures. But as I approached my “Second Act,” I realized a terrifying truth: the very expertise that made me successful was no longer building the brain I would need at eighty. I was high-functioning, but cognitively, I was coasting on old deposits.…