Two people can have similar age-related changes in their brains, yet one may have far fewer problems with memory and thinking. Researchers believe cognitive reserve helps explain the difference.
Your brain's savings account
Think of cognitive reserve as a store of resilience you build over a lifetime. A brain with a rich network of connections has more backup routes, so it can work around damage more easily.
The encouraging part: in 2024, the Lancet Commission on dementia identified 14 risk factors that can be changed, and estimated that addressing them could, in theory, prevent or delay close to half of dementia cases. These include physical inactivity, hearing loss, high blood pressure, smoking, social isolation and depression.
6 everyday habits that build reserve
1. Move
Exercise boosts blood flow to the brain and helps manage blood pressure and blood sugar. Health guidelines suggest about 150 minutes of moderate activity a week, plus strength training twice a week.
2. Learn something hard
New, challenging activities like a language, an instrument or a class give your brain a real workout. If it feels effortless, level up.
3. Connect
Social isolation is linked to higher dementia risk. Conversation is a complex mental workout, and close relationships help buffer stress.
4. Sleep well
Most adults need 7 to 9 hours a night. A consistent wake-up time and an hour of screen-free wind-down help.
5. Eat for your heart and brain
Eating patterns rich in vegetables, berries, nuts, beans, whole grains, olive oil and fish are linked to better brain health.
6. Protect
Know your blood pressure, cholesterol and blood sugar numbers, get your hearing and vision checked, and wear a helmet when cycling.
It's never too late
Your brain keeps changing throughout life. Small habits, repeated daily, are an investment in your future self.
Build your plan
Sharp for Life. is our 30-page printable guide to cognitive reserve, with the 6 pillars, a 30-day kickstart, a habit tracker and a checkup log to bring to your doctor.
This article is for general education only and isn't medical advice. Talk to a healthcare professional about your own health.