Dr. Tommy Wood on Neuroplasticity, Clutch States, Exercise and Nutrition to Learn Faster and Protect Your Brain

High-Level Overview

Andrew Huberman talks with Dr. Tommy Wood, a medical doctor and neuroscience researcher at the University of Washington, chief science officer of Better Brain, author of The Stimulated Mind, and a competitive natural strongman. Their subject is neuroplasticity: how the brain keeps changing throughout life, and what practical levers (new skills, focused practice, nutrition, supplements and different kinds of exercise) make learning faster and protect cognition as we age. They also cover dementia risk factors, the surprising data on the shingles vaccine, and what to do after a concussion.

The tone is enthusiastic and technical but grounded, with Huberman repeatedly saying he learned something new, especially the idea of a "clutch state." The conversation moves from core neuroscience to learning and performance psychology, then to nutrition and supplements, exercise, dementia prevention and brain injury, ending with a lighthearted look at Wood's strongman events.

The Discussion Explores:

• What neuroplasticity really is: changing and pruning connections, not growing new neurons
• Why novel, challenging skills (especially dancing, ball sports and martial arts) are powerful plasticity drivers at any age
• Flow versus "clutch states," and why hard, effortful practice is where learning happens
• How long and how often to practice, and how to protect focus from distraction
• Nutrition for the brain: energy balance, key nutrients, testing levels and nutrient interactions
• Why stimulants can make you feel sharper while you perform worse
• How aerobic exercise, high-intensity intervals and resistance training affect different parts of the brain
• Modifiable dementia risk factors, the shingles vaccine, avoiding serious illness, and concussion recovery

Deep Dive into Main Ideas

Plasticity Is About Connections, Not New Neurons

Wood defines neuroplasticity as the brain responding to inputs so we can better navigate and survive our environment. Every time we learn or remember something, synapses are created, strengthened or weakened, and he stresses that pruning, the removal of unneeded connections, is as important as growth. He believes people have confused neurogenesis with plasticity: adults make few new neurons outside small regions like the hippocampus, which led to the old idea that the adult brain is fixed. But a relatively fixed number of cells can still constantly change their connections.

One reason function declines with age, he explains, is that we stop giving the brain inputs, so pruning removes abilities we no longer use. Huberman adds that adding new neurons to a circuit may not even be the best way to change it.

Seek Novelty and Challenge

Older adults who stay engaged in cognitively demanding activities show slower decline, and randomized trials show that novel activities like language learning, complex movement and musical training improve function, especially executive function. Wood describes the ACTIVE trial, whose processing-speed training group, with booster sessions at one and three years, had a significantly lower risk of dementia 20 years later. Processing speed tends to hold until about 60 and then drop, partly because we stop doing things that require fast processing.

Crosswords and Sudoku, he says, are more meditative than truly challenging; building capacity requires being both focused and challenged, and the breadth of the benefit matches the breadth of the stimulus. Dancing has the strongest evidence, with meta-analyses favoring ballroom and line dancing, which combine movement, music, social interaction and learning. Ball sports, skateboarding (with a helmet), martial arts like Brazilian jiu-jitsu, visual arts, languages and even video games also help. The barrier is psychological: "adults hate being bad at things," Wood says, so embracing the embarrassment of being a beginner matters. The payoff extends beyond skill; he says "we like to be good at stuff and we like to overcome things," and proving you can improve spills into the rest of life.

Flow, Clutch States and Real Practice

Wood defines flow as "the maximal expression of a complex learned skill," and pushes back on the idea that you must be in flow to perform or learn well. Sports psychology also describes clutch states: performing at your best while it still feels like hard work. Learning requires friction, errors and working beyond your current capacity, which by nature pulls you out of flow. Huberman calls it one of the most useful ideas he's heard and links it to the anterior mid-cingulate cortex, associated with tenacity.

Wood shares the rule of thirds from athletic training: a third of sessions feel great, a third average, and a third terrible, and that's normal. On the 10,000-hour idea, he notes the original study only found that expert violinists had averaged that much practice by age 20. More useful was their routine: about two sessions of 60 to 90 minutes a day. For hard cognitive work, focus comes in chunks of roughly 20 to 30 minutes, which is why the Pomodoro approach fits, even without strong studies behind it. A study of pianists found practice, not age, best predicted skill.

Protecting Focus

Eliminating distractions is one of the most important things for deep work: close email and Slack and put the phone in another room. Citing Gloria Mark's book Attention Span, Wood explains that "you get used to a pattern of distraction such that when you're not actually being distracted, you will distract yourself," though this can be trained away. When he hits a sticking point, he switches to another project. Huberman mentions research suggesting even a phone in your bag carries a cognitive cost, and both note that unstructured time, like the shower, lets the brain integrate ideas.

Nutrition, Nutrients and Supplements

Most dementia diet research uses versions of the Mediterranean diet, like the MIND diet, but a large trial found the MIND diet performed no better than simple calorie restriction. Wood explains that brain volume follows a bell curve with energy availability: both chronic deprivation and chronic excess are linked to smaller brains. So first eat enough but not too much, then cover critical nutrients: vitamin D, iron, omega-3 fatty acids and methylation B vitamins (B12 and folate), plus polyphenols, carotenoids, fiber, magnesium, zinc and choline.

The body has more buffer than people assume; fat tissue stores omega-3s, so eating fish early in the week covers later days. His main advice is to test levels, including vitamin D, iron, omega-3s and homocysteine, since risk rises above about 13 even when labs call up to 15 or 16 normal. Nutrients interact: several trials show B vitamins that lower homocysteine only help people with adequate omega-3 status, and vice versa, which may explain many null supplement studies. In the COSMOS study, a basic multivitamin (Centrum Silver) modestly helped cognition. His bottom line: "don't be deficient." On peptides, which Huberman says are exploding in popularity, Wood wants evidence of safety first and a specific problem to solve; creatine stands out because it is well documented as safe.

Feeling Versus Performing

Wood says how athletes feel predicts performance better than HRV or blood tests. But stimulants can split feeling from performance: people on caffeine feel sharper yet make more errors on complex working-memory tasks, and similar findings exist for ADHD medications in people without ADHD, and for cannabis and creativity. Exercise raises arousal without that disconnect, as long as it isn't exhausting. For a cognitive boost right after exercise, the best evidence supports about a 20- to 30-minute jog, a short machine-based resistance session, or a few brief max-effort sprints. Huberman adds that holding back on volume keeps him sharper for the rest of the day.

Different Exercise, Different Brain Benefits

For long-term change, intensity matters. A well-known study of brisk walking for 40 minutes three times a week for a year increased hippocampal volume. But a newer study found that older adults doing the Norwegian 4x4 (four minutes at 85 to 95% of max heart rate, three minutes rest, four rounds, three times a week for six months) improved fitness as much as the zone 2 group yet had much better hippocampal function and structure, maintained for five years. Those who worked hardest and released the most cortisol benefited most.

Both argue cortisol has been unfairly demonized. Wood explains that acute stress drives adaptation, while chronic stress without recovery is what harms health. Resistance training, typically two or three times a week with five or six machine exercises for three sets of 8 to 12 reps over six to 12 months, improves white matter structure and executive function, likely partly through IGF-1. His summary: aerobic exercise benefits gray matter and memory, resistance training benefits white matter and processing, so do both.

Dementia Risk, the Shingles Vaccine and Staying Well

Alzheimer's makes up about 60 to 80% of dementia cases, and single-gene forms are under 5%. Wood says it is now accepted that "potentially half of cases of dementia are preventable." The Lancet Commission lists 14 modifiable risk factors, including early education, high blood pressure, diabetes, hearing and vision loss, brain trauma, high LDL cholesterol, physical inactivity and social isolation, accounting for about 45% of cases. He believes sleep (risk rises below about six hours) and nutrient status should arguably be included.

Natural experiments in Wales, Australia and Canada, where eligibility for the shingles vaccine switched on a birth date, consistently linked the vaccine to lower dementia risk, with a stronger signal in women and a newer U.S. study favoring Shingrix over the older Zostavax. Wood thinks there's a real signal while noting possible confounding and a planned randomized trial. More broadly, cognition tends to drop in steps after serious illness or hospitalization, so avoiding getting very sick protects the brain.

After a Concussion

After being properly checked by a doctor, Wood's evidence-informed steps are to avoid overheating, since the "brain doesn't like to get too hot," to avoid sugary refined carbohydrates, alcohol and caffeine, and to protect sleep. Supplements with some evidence include creatine (a pediatric trial used 0.4 grams per kilogram per day), magnesium at about 400 milligrams once or twice daily, omega-3s long-term for athletes at risk, citicoline at one to two grams a day, and, for sleep problems, melatonin or high-dose branched-chain amino acids. Return to light aerobic activity as soon as tolerated is now standard, along with vestibular and eye-movement therapy where needed. The episode ends with Wood, 41, describing his upcoming natural world strongman events, including farmer's walks with 264 pounds per hand.

Conclusion

Tommy Wood's message is that the brain stays changeable for life, but it needs the right inputs: new, challenging skills that you're willing to be bad at, focused practice in realistic chunks, adequate energy and nutrients confirmed by testing, and a mix of hard aerobic and resistance exercise. Learning happens in effortful clutch states, not only in effortless flow, and short-term stress is what drives adaptation. Add in protecting sleep, avoiding serious illness and head injuries, and managing modifiable risk factors, and much of cognitive decline may be delayed or prevented. It's a dense, practical guide to getting better at getting better.

This is a summary of "Accelerate Learning & Increase Cognitive Capacity | Dr. Tommy Wood" from Huberman Lab, giving you the GIST so you can decide if you want the REST. Listen to the full episode.