Podcast: Play in new window | Download
Summary
On episode 112 of 40+ Fitness, Coach Allan sits down with Dr. Gary Small, a professor of psychiatry and director of the UCLA Longevity Center at the Semel Institute for Neuroscience and Human Behavior, and author of the New York Times bestseller The Memory Bible, to talk about his book Two Weeks to a Younger Brain.
They cover what actually happens to the brain as we age, the genetics behind that decline (APOE and BDNF), and Dr. Small's simplified “focus and frame” method for remembering names and information.
The conversation moves into modifiable risk factors, how midlife obesity and inflammation raise Alzheimer's risk, and how exercise, interval training, and daily meditation can meaningfully protect brain health at any age.
Links
- https://drgarysmall.com
- https://insighttimer.com
- https://www.calm.com
Key Takeaways
- Brain aging is real but mostly invisible, and largely manageable. Unlike gray hair or sagging skin, you can't see brain aging without a scan or cognitive test, and for most people it shows up as mild slowing rather than serious decline, something a lot can be done to offset.
- The APOE4 gene raises Alzheimer's risk, but it isn't destiny. About 20% of people carry the APOE4 form of the gene, which raises risk and can lower the age of onset. But Dr. Small's research shows that even APOE4 carriers who exercise regularly show less Alzheimer's pathology in the brain.
- Genetic testing for Alzheimer's risk isn't recommended for most people. APOE status is neither necessary nor sufficient to cause the disease, and studies show that simply telling APOE4 carriers about their genetic risk makes them perform worse on memory tests, a kind of self-fulfilling effect.
- BDNF acts like fertilizer for brain cells. This gene helps nerve cells sprout the branches that let them communicate more effectively, and physical exercise is one of the most reliable ways to increase it.
- The “focus and frame” method simplifies memory improvement into two steps. Focus means fully paying attention instead of being distracted, and frame means building a vivid visual association, like linking curly-haired “Harry” to his hair, so the information sticks.
- Brain training should challenge you, not overwhelm or bore you. Dr. Small's core principle is to “train, not strain” the brain: puzzles and mental challenges work best when they're pitched right at the edge of your current ability.
- Central obesity in midlife raises long-term Alzheimer's risk through inflammation. Abdominal fat cells are metabolically active and pro-inflammatory, and autopsy studies show inflammatory markers around the amyloid plaques found in Alzheimer's brains. The encouraging part: people who lose weight show memory improvements that last for years.
- Exercise, including short interval training, delivers outsized brain benefits. Cardiovascular exercise increases blood flow and BDNF, strength training adds further cognitive benefits, and a study comparing interval training to steady-state cardio found equivalent health benefits in about a quarter of the time.
- Just 10 minutes of daily meditation changes the brain. UCLA research found measurable improvements in mood and cognition from brief daily meditation, along with benefits for blood pressure and chronic pain.
“You want to train and not strain your brain.”
Dr. Gary Small
Another Episode You May Enjoy
Episode 218 – The science of mind over body with Jo Marchant