Accelerate Learning & Increase Cognitive Capacity | Dr. Tommy Wood

A recent study on older adults compared low-intensity exercise, zone 2 treadmill work, and high-intensity interval training (HIIT) using the Norwegian 4x4 protocol (4 minutes at 85-95% max heart rate with 3-minute rest). The HIIT group showed comparable fitness improvements to the zone 2 group but demonstrated significantly better hippocampal function and structure maintenance, confirmed by MRI scans. Remarkably, these benefits were sustained for five years after just six months of intervention.

Dr. Wood is a competing natural strongman athlete, participating in drug-tested competitions with a 'lifetime no gear' requirement. This unique combination of neuroscience research and athletic performance provides him with a distinct perspective on human potential and the intersection of physical and cognitive optimization.

Dr. Wood recently released a book titled 'The Stimulated Mind: Futureproof Your Brain from Dementia and Stay Sharp at Any Age.' This resource provides further exploration into the science and practical applications of brain health, offering insights for maintaining cognitive function across all ages.

Dr. Wood emphasizes that neuroplasticity – the brain’s ability to change and adapt – is its most crucial function. Without this capacity for modification, other cognitive functions become irrelevant; it's a process essential throughout life, allowing us to continuously learn and evolve.

Dr. Wood references the 'Maintain Your Brain' study, initially believed to be focused on older adults (65+), but was actually a midlife intervention targeting individuals in their 50s and 60s. The study employed a multi-domain approach, incorporating dietary changes, physical activity, cognitive behavioral therapy for mental health concerns, and online brain training as key components. This holistic strategy highlights the interconnectedness of various factors impacting cognitive function.

The Pointer trial, a replication of an older Finnish study called the Finger trial, was conducted in the US with individuals aged 60s and 70s. It mirrored the original trials by combining diet, exercise, cardiovascular risk factor management, and brain training. This approach underscores the importance of a comprehensive lifestyle intervention for maintaining cognitive health as people age.

The Pointer trial utilized Brain HQ, a platform developed based on the work of Mike Mzinich, recognized as a pioneer in learning and neuroplasticity. A core component of this training focuses on developing and maintaining processing speed, which naturally declines with age. This type of training aims to improve cognitive efficiency by enhancing the ability to quickly process information.

A secondary analysis of the Active trial revealed that processing speed training, coupled with booster sessions at one and three years, significantly reduced the risk of dementia 20 years later. This finding suggests a direct link between improving cognitive processing speed and long-term brain health. The mechanism is believed to involve improvements in co-allergic signaling within the forebrain.

Dr. Wood explains that a decline in cognitive function with age may be linked to a lack of novel or complex inputs for the brain, which are crucial for neuroplasticity. He posits that adults often avoid trying new things because they dislike being bad at them and fear judgment from others, hindering their ability to maintain cognitive function.

The discussion touches on the social dynamics of partner dances like salsa and tango, noting that traditionally male roles often involve leading. This can create unique challenges for men learning these dances, as they are essentially guiding their partners while also being evaluated. Tim Ferriss's experience with a female dance coach highlights how overcoming this challenge requires specific guidance.

The speaker emphasizes the importance of embracing a ‘beginner’s mind’ and being willing to make mistakes when learning new skills. He describes an observed phenomenon where even small improvements in a skill like tango can lead to positive changes in other areas of life, such as improved sleep, increased excitement, and better interactions with others – a 'halo effect' stemming from nervous system arousal.

The speaker suggests that the positive effects of learning new skills, even with initial struggles, are rooted in a fundamental human need to be challenged and overcome obstacles. This process contributes to feelings of accomplishment and can have downstream benefits for mental well-being, potentially affecting sleep quality and overall excitement for life.

The discussion references a quote from Formula 1 driver Aton Senna, describing an experience during the Monaco Grand Prix where he felt disconnected and was going significantly faster than his perceived capabilities. This illustrates a state approaching flow, where performance transcends conscious effort and feels almost automatic due to mastery. The speaker highlights this as a key indicator of virtuosity and achieving peak performance.

Drawing from the 'Dark Wizard' documentary, the conversation emphasizes the importance of consistent practice of fundamental skills. Twilight Tharp, a world-renowned choreographer, had her dancers repeatedly perform basic drills for hours daily, even before attempting new routines. This highlights that high performers dedicate significant time to maintaining foundational abilities, often unseen by observers.

A common pattern emerges across various learning disciplines – a 'thirds' rule. Approximately one-third of training sessions will feel exceptionally good, one-third will be average, and the final third will be challenging or even unpleasant. This underscores that consistent effort and pushing through difficult periods are essential for growth, rather than solely pursuing moments of effortless flow.

A study involving expert and amateur pianists revealed that the most significant predictor of skill performance wasn't age, but rather the amount of practice. This reinforces the idea that consistent repetition and focused effort are critical for maintaining proficiency in specific skills, even when those skills become integrated into more complex performances.

The MIND diet, designed to prevent neurodegenerative delay, is a combination of the Mediterranean diet and the DASH diet. It originated from the Rush University Memory and Aging Project, which analyzed the eating habits of individuals and correlated them with dementia risk. The initial development involved scoring foods based on frequency of consumption, identifying those associated with lower dementia risk.

A clinical trial comparing the MIND diet to standard caloric restriction revealed surprisingly similar cognitive benefits in both groups. This suggests that reducing overall energy intake, even without adhering strictly to a specific dietary pattern like the MIND diet, can positively impact brain health, potentially due to improvements in metabolic function.

Research indicates that the overall quality and nutrient density of a diet, rather than avoiding specific foods like red meat or restricting olive oil consumption, are key factors in maintaining cognitive health. Studies analyzing Mediterranean diets found no single food or food group significantly impacted dementia risk when considered within the broader context of dietary patterns.

Studies comparing brain volume across different populations, including Bolivian tribes and industrialized societies, revealed an inverted U-shaped relationship with energy availability. Both chronic caloric restriction and chronic energy excess are associated with smaller brain volumes, highlighting the importance of maintaining a balanced energy intake for optimal brain health.

Dr. Wood emphasizes that simply supplementing with nutrients without understanding individual needs is unlikely to yield noticeable effects. He highlights the need for targeted supplementation based on specific deficiencies, referencing examples where broad-spectrum approaches haven't shown significant results. This contrasts with a personalized approach, which he believes is crucial for optimizing cognitive function.

The Cosmos study, involving thousands of older adults, demonstrated some cognitive benefits from a basic multivitamin (Centrum Silver providing 100% of the recommended daily allowance). While not a dramatic effect, it suggests that covering nutritional bases with a standard multivitamin can be a reasonable strategy for the general population. The study also showed cocoa flavonol supplementation was only beneficial in those with poor diets.

A sponsor segment introduces Function, a service providing comprehensive lab tests (including advanced MRI and CT scans) to assess various health aspects like heart health, hormone levels, nutrient status, and autoimmune function. The host shares his personal experience using Function to identify and correct blood lipid imbalances through nattokinase supplementation, highlighting the value of proactive health monitoring.

Dr. Wood envisions a future where routine bloodwork informs personalized supplement recommendations, moving away from generic 'biohacking' approaches. This collaborative model would involve individuals and healthcare professionals tailoring supplement regimens based on lab results and subjective well-being metrics, leveraging technology for data tracking and analysis to optimize health outcomes.

Dr. Wood emphasizes that before considering any supplement or intervention, the first priority should be documented safety data. He highlights that simply lacking evidence of adverse effects isn't sufficient, as long-term risks remain unknown. He stresses individual risk tolerance and encourages people to seek proven safety information before experimentation.

Creatine, omega-3s, and magnesium are presented as examples of supplements with some supporting evidence. However, creatine stands out due to its robust safety profile even at high doses in elderly populations. While individual responses vary (responders vs. non-responders), the established safety makes it a worthwhile consideration.

The discussion pivots to the role of arousal and alertness in facilitating brain plasticity. Stimulants like caffeine and elyeron are mentioned, not as direct learning enhancers, but rather as substances that create a preparatory state conducive to learning. This suggests that increasing arousal may be a crucial step before engaging in activities designed to promote neuroplasticity.

Dr. Wood argues that an athlete's subjective feeling of well-being is a more reliable indicator of performance than objective physiological data like HRV or blood tests. He references research consistently demonstrating this point, suggesting that self-reported feelings offer valuable insight into overall readiness and potential for success.

A study on the Norwegian 4x4 exercise protocol demonstrated that high-intensity interval training resulted in improved fitness comparable to zone 2 training, but with significantly better improvements in hippocampal function and maintenance of hippocampal structure as observed through MRI scans. Participants maintained these benefits for five years following a six-month intervention period, suggesting long-term neuroprotective effects from intense physical activity.

Research within the Norwegian 4x4 study revealed a positive correlation between the intensity of exercise and its benefits. The harder individuals worked, and consequently, the more cortisol they released during high-intensity interval training, the greater the improvements observed. This challenges the common narrative that cortisol is always detrimental and highlights its potential role in neuroplasticity.

A 2020 Environmental Working Group study found that over 200 million Americans are exposed to PFAS (forever chemicals) through tap water, linked to hormone disruption, gut microbiome issues, and fertility problems. Furthermore, more than 122 million Americans consume tap water containing high levels of cancer-causing chemicals, prompting the discussion of alternative filtration methods.

There's a widespread fear surrounding cortisol that is often unwarranted. Moderate intensity exercise, including resistance training and cardio, can significantly elevate baseline cortisol levels without causing harm. It’s important to recognize the role of morning cortisol in promoting sleep quality and energy levels throughout the day.

Dr. Wood explains that certain biological processes, like REM sleep and long-term potentiation, are relatively easy to disrupt with minor adjustments. For example, tweaking the system slightly can cause a deficit in REM sleep, while manipulating neurons in a dish or animal can easily increase or decrease long-term potentiation – demonstrating how readily these systems can be tilted.

The speaker notes a shift in understanding regarding exercise's impact on learning. He now believes that resistance and cardiovascular training are key drivers of plasticity, mirroring how motor skills development occurs. This contrasts with earlier views focusing solely on increased neuron production through mouse studies, which he now considers less meaningful for human cognitive function.

Dr. Wood's perspective on exercise has evolved; he no longer views it simply as increasing blood vessel growth and metabolic health, which then benefits the brain. Instead, he now considers resistance training and cardio to be direct triggers for plasticity, deploying numerous interacting molecules within the body – a significant change from his previous understanding.

The speaker highlights that potentially half of dementia cases are preventable, primarily through addressing Alzheimer's and vascular dementia. He emphasizes the importance of early intervention to mitigate cognitive decline, drawing parallels with preventative measures for diabetes, suggesting a shift towards proactive neurological health management.

Experts discuss the relationship between herpes viruses and dementia risk, noting that while there's a mechanistic link, it doesn't establish direct causation. A key characteristic of herpes viruses is their ability to infect neurons without killing them, allowing them to persist within the host. This survival strategy highlights how these viruses are adept at maintaining a long-term presence in the body.

The discussion emphasizes that cognitive function doesn't decline steadily with age but rather experiences stepwise decreases following periods of significant illness. Studies like the Adult Changes in Thought study at the University of Washington and the Rush Memory and Aging Project have demonstrated this pattern, showing that individuals experiencing major illnesses or hospitalization often exhibit a noticeable drop in cognitive performance.

Maintaining long-term cognitive function is strongly linked to minimizing the chances of getting seriously ill. The Adult Changes in Thought study and Rush Memory and Aging Project revealed that periods of illness lead to noticeable drops in cognitive performance, suggesting that preventative measures against sickness can positively impact overall brain health over time.

Following a concussion, temperature management and regulation are crucial for recovery. The speaker's PhD research focused on hypothermia after acute brain injury, indicating the potential benefits of controlled cooling in mitigating damage and promoting healing. This approach is supported by both animal studies and some observational human data.

Following a traumatic brain injury, Dr. Wood outlines a phased return-to-play protocol for athletes. This involves starting with low-intensity aerobic activity (twice or three times weekly), progressing to non-specific exercises, then skill-specific drills, full training, and finally returning to playing – all at levels below symptom exacerbation. Sports teams should ideally have this systematized as standard care.

Dr. Wood emphasizes the importance of physical therapy for athletes experiencing ongoing cognitive or physical symptoms after a traumatic brain injury, particularly if those symptoms persist for over a month. He notes that virtual/augmented reality and vestibular therapy can be beneficial in addressing balance and dizziness issues.

A common, often overlooked issue after concussions is problems with eye movement (ocular motor function), such as convergence difficulties. Dr. Wood highlights the increasing use of ocular motor training and eye tracking to identify and address these issues in athletes, particularly at professional levels.

The strongman competitor explains the competition format, noting that he competes in a 'Masters' category due to his age (41) and weight class. He describes how competitors are divided into lightweight and heavyweight categories, with athletes over 40 competing in Masters divisions, often requiring a water cut for weigh-ins.