Neuroplasticity Basics
Wood defines neuroplasticity as the brain changing its connections in response to experience. He emphasizes that learning depends on strengthening some synapses and pruning others.
Accelerate Learning & Increase Cognitive Capacity | Dr. Tommy Wood
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Dr. Tommy Wood, BM, BCh, PhD, is a professor of neuroscience at the University of Washington and an expert on brain health, neuroplasticity, and cognitive performance. Dr. Wood explains how to use specific forms of exercise, dietary strategies, and compounds to enhance the rate …
Dr. Tommy Wood, BM, BCh, PhD, is a professor of neuroscience at the University of Washington and an expert on brain health, neuroplasticity, and cognitive performance. Dr. Wood explains how to use specific forms of exercise, dietary strategies, and compounds to enhance the rate and stability of mental and/or physical skill development. We also discuss science-based tools to preserve cognitive function, reduce dementia risk, and offset loss of memory after a concussion or other brain injury. This episode provides practical, science-based tools for learning new information and skills and for improving your overall ability to learn. Read the episode show notes at hubermanlab.com. Thank you to our sponsors AG1: https://drinkag1.com/huberman David: https://davidprotein.com/huberman Function: https://functionhealth.com/huberman Rorra: https://rorra.com/huberman
Key Topics
- Neuroplasticity Basics
- Plasticity vs New Neurons
- Pruning and Skill Learning
- Aging and Cognitive Inputs
- Novelty Versus Familiar Activities
- Broad Skills Transfer Better
- Best Activities for Brain Health
- Why Adults Avoid Being Beginners
- Challenge Builds Confidence
- Flow and Clutch States
- Learning Requires Friction
- Practice Volume and Session Length
- Attention and Distraction Training
- Meditation and Mental Space
- Diet Patterns for Cognitive Health
- Energy Balance and Brain Health
- Key Nutrients for the Brain
- Testing Before Supplementing
- Nutrient Interactions Matter
- Supplements and Safety Standards
- Subjective Feeling Versus Performance
- Exercise as a Plasticity Trigger
- Acute Exercise for Better Cognition
- Avoiding Exhaustive Workouts Before Thinking
- High Intensity Cardio and the Hippocampus
- Cortisol as an Adaptive Signal
- Resistance Training and White Matter
- Different Exercise Modes Change Different Brain Systems
- Dementia as a Preventable Process
- Major Dementia Risk Factors
- Sleep and Dementia Risk
- Shingles Vaccine and Dementia Signal
- Illness and Stepwise Cognitive Decline
- Immediate Steps After Concussion
- Supplements After Brain Injury
- Return to Activity After Concussion
Plasticity vs New Neurons
The discussion separates neuroplasticity from neurogenesis. Adult brains make few new neurons, but they can still change extensively by rewiring existing circuits.
Pruning and Skill Learning
In motor learning, improvement comes from both building useful connections and removing inefficient ones. This mirrors childhood development, where refinement is as important as growth.
Aging and Cognitive Inputs
They argue that age-related decline partly reflects reduced exposure to challenging inputs. If the brain stops receiving demands to maintain a function, it may gradually prune that capacity.
Novelty Versus Familiar Activities
Continuing familiar hobbies appears to help preserve cognition, especially in older adults. But randomized trials also show benefits from taking on new cognitive and motor challenges.
Broad Skills Transfer Better
Wood argues that broad, complex activities transfer better than narrow brain-training tasks. Sports, music, and social movement challenge multiple systems at once and may generalize more to daily life.
Best Activities for Brain Health
Dancing, ball sports, martial arts, skateboarding, visual arts, gaming, and language learning are highlighted. These activities combine challenge, coordination, timing, and often social interaction.
Why Adults Avoid Being Beginners
A major barrier to lifelong learning is that adults dislike being bad at things. Wood argues that tolerating embarrassment and mistakes is essential for maintaining neuroplasticity.
Challenge Builds Confidence
Improving at a difficult new skill can change how people feel across the rest of life. The speakers frame this as a core psychological reward of overcoming meaningful challenges.
Flow and Clutch States
Wood distinguishes flow from a 'clutch state.' Flow is effortless high-level expression, while clutch performance is still excellent but feels effortful and cognitively demanding.
Learning Requires Friction
They reject the idea that flow is necessary for learning. Real learning often happens outside flow, where mistakes, stress, and repeated correction create the conditions for adaptation.
Practice Volume and Session Length
The famous 10,000-hour idea is described as an observation, not a rule. Wood suggests that hard learning usually works best in 60 to 90 minute sessions, often only a couple per day.
Attention and Distraction Training
Modern distraction trains the brain to expect interruption. Wood stresses removing phones and notifications, noting that people otherwise begin to self-interrupt even without external prompts.
Meditation and Mental Space
They discuss meditation and unstructured downtime as ways to reduce constant input. Even when attention drifts, these periods may support integration and idea formation.
Diet Patterns for Cognitive Health
Most dementia-prevention diet research centers on Mediterranean-style eating patterns. Wood sees the main benefits as coming from overall diet quality, nutrient density, and appropriate energy intake.
Energy Balance and Brain Health
Both chronic undernutrition and chronic caloric excess can harm brain structure and function. Wood emphasizes eating enough, but not too much, as a first principle for long-term cognitive health.
Key Nutrients for the Brain
He highlights vitamin D, iron, omega-3s, B vitamins, magnesium, zinc, choline, fiber, and polyphenol-rich foods. The focus is on avoiding insufficiency before chasing performance optimization.
Testing Before Supplementing
Wood recommends using blood markers such as vitamin D, iron status, omega-3s, and homocysteine where possible. He argues supplementation works best when it corrects a measured need.
Nutrient Interactions Matter
A major example is the interaction between omega-3 status and B vitamins that lower homocysteine. Several trials suggest that one may not help much if the other is inadequate.
Supplements and Safety Standards
The conversation criticizes the hype around supplements and peptides without strong human evidence. Wood's standard is to ask first whether something is safe, then whether it solves a specific problem.
Subjective Feeling Versus Performance
How someone feels is often a strong predictor of performance. But stimulants can create a mismatch, making people feel sharper while actually worsening performance on certain complex tasks.
Exercise as a Plasticity Trigger
Exercise is presented as one of the most powerful ways to support learning and brain change. Its effects go beyond arousal and involve distinct molecular and structural adaptations in the brain.
Acute Exercise for Better Cognition
A brief session such as a 20 to 30 minute jog or moderate resistance workout can improve attention and learning readiness. The likely mechanism is a moderate increase in arousal-related chemicals.
Avoiding Exhaustive Workouts Before Thinking
Very intense or high-volume training can temporarily impair cognition afterward. They recommend leaving some capacity in reserve if important mental work is planned later that day.
High Intensity Cardio and the Hippocampus
A study in older adults found that Norwegian 4x4 intervals improved hippocampal structure and function more than lower-intensity cardio. Those benefits were still detectable years after the intervention.
Cortisol as an Adaptive Signal
Wood pushes back on the idea that cortisol is inherently harmful. In the context of short, intense exercise, cortisol is framed as part of a useful stress response that drives adaptation.
Resistance Training and White Matter
Long-term resistance training appears to particularly benefit white matter structure. These changes are linked with improvements in executive function and may complement aerobic effects on gray matter and memory.
Different Exercise Modes Change Different Brain Systems
Aerobic training is described as especially beneficial for gray matter and hippocampal function. Resistance training may preferentially support white matter, which is why Wood argues both should be included.
Dementia as a Preventable Process
Wood frames dementia as the endpoint of a long decline, not a sudden event. He says a substantial fraction of cases may be preventable through earlier changes in lifestyle and risk factors.
Major Dementia Risk Factors
The conversation highlights education, blood pressure, diabetes, hearing loss, vision loss, inactivity, cholesterol, trauma, and social isolation. These factors overlap strongly with general metabolic and cardiovascular health.
Sleep and Dementia Risk
Although some formal reports do not include sleep as a core risk factor, Wood argues the evidence is meaningful. Risk appears to rise especially when sleep regularly falls below about six hours.
Shingles Vaccine and Dementia Signal
They review natural experiment studies suggesting shingles vaccination may lower dementia risk. Wood sees a real signal, though he notes that randomized trials are still needed for stronger causal claims.
Illness and Stepwise Cognitive Decline
Major illnesses may produce noticeable step-downs in cognitive function rather than a smooth decline. This supports the idea that avoiding severe sickness is itself an important brain-protection strategy.
Immediate Steps After Concussion
For mild to moderate concussion, Wood emphasizes medical evaluation first, then avoiding overheating, poor sleep, alcohol, and excessive stimulation. Early temperature and blood sugar management may reduce secondary stress on the brain.
Supplements After Brain Injury
He discusses creatine, magnesium, omega-3s, choline, melatonin, and branch chain amino acids as options with varying levels of evidence. The theme is low risk, plausible benefit, and matching the intervention to symptoms.
Return to Activity After Concussion
The old advice of prolonged dark-room rest has shifted. Early, carefully graded aerobic activity and structured return-to-play protocols are now seen as important for recovery.