Dr. Wood explains that neuroplasticity, the brain's ability to change, is maintained through a combination of familiar cognitive activities and novel, challenging tasks that combine motor and cognitive elements, like learning a sport or dance. He emphasizes that practice, not age, is the key predictor of skill maintenance. For brain health, overall diet quality and nutrient density are more important than specific foods, with supplements like omega-3s and B vitamins only showing benefits if a person is deficient. Exercise is a powerful trigger for neuroplasticity: moderate exercise boosts arousal for learning, while high-intensity interval training (HIIT) stimulates BDNF production and improves brain structure. Dr. Wood also discusses modifiable risk factors for dementia, noting that up to half of cases may be preventable through factors like education, blood pressure, and physical activity. He provides specific protocols for concussion recovery, including creatine supplementation and early return to low-level aerobic activity.