Why Walking Is The Superpower You Didn’t Know You Had with Professor Shane O’Mara #84
Neuroscientist Shane O'Mara, Professor of Experimental Brain Research at Trinity College Dublin, discusses walking as an underrated "superpower." He reveals its profound benefits for memory, attention, creativity, mood, and brain aging, advocating for redesigning environments to prioritize pedestrian movement.
Deep Dive Analysis
17 Topic Outline
Introduction to Shane O'Mara and the Science of Walking
The Evolutionary Imperative and Efficiency of Human Walking
Modern Sedentary Lifestyles and Environmental Design Challenges
Evolutionary Advantages of Bipedalism and Walking
Comparing Walking to Running and Injury Risk
The 'EASE' Framework for Pedestrian-Friendly Urban Design
Social Walking, Group Dynamics, and Collective Action
Walking's Impact on Brain Health, Memory, and Attention
How Walking Enhances Creativity and Problem-Solving
The Brain's Activity Levels: Sedentary vs. Active States
Walking's Benefits for Mood and Mental Health
Lessons from Hunter-Gatherer Tribes on Movement and Diet
Understanding Energy Expenditure and Exercise-Induced Inactivity
Overcoming Walking's Perception as 'Too Simple'
The Deceptive Complexity of Human Walking for Robots
Practical Tips for Incorporating More Walking into Daily Life
Using Technology to Support and Enhance Walking Habits
6 Key Concepts
Functional Aging of the Brain
This refers to the decline in cognitive performance and brain volume, particularly in the hippocampal formation, that typically occurs with age. Consistent physical activity like walking has been shown to slow or even reverse this functional aging.
Default Mode Network
This is a brain network that becomes active when the mind is not focused on an external task, allowing for broader perspective and 'zooming out' from specific problems. Creative problem-solving often involves flickering between this state and focused attention.
Task Positive Network
This brain network is engaged when an individual is actively focusing on a specific task or problem. Optimal creative problem-solving involves the ability to switch effectively between the task positive network and the default mode network.
Active Idle Mode of Thought
This describes a state of mind, often facilitated by walking, where an individual can rhythmically focus in on a problem and then pull back from it. This process helps generate new ideas and solutions more effectively than remaining sedentary.
Exercise-Induced Inactivity
This phenomenon describes how a period of intense exercise can lead to subsequent periods of reduced overall activity and increased hunger. This can potentially counteract the energy expenditure benefits if not considered in the context of total daily movement and calorie intake.
Passeggiata
An Italian cultural tradition where people gather in car-free town centers, typically in the evening, for a leisurely social walk. It fosters community, allows for conversation or companionable silence, and provides a relaxed social experience.
10 Questions Answered
Walking is an astonishing capacity unique to humans, allowing for efficient long-distance travel, carrying items and weapons, and enabling the collective activities that facilitated human migration and conquest of the planet.
No, modern sedentary lifestyles and car-centric environments mean humans walk far less than evolution designed. Average daily steps in countries like the UK and US are around 4,000, significantly below our natural capabilities.
Walking increases the volume of the hippocampal formation, boosts brain-derived neurotrophic factor (BDNF), and improves memory and attention, effectively reversing the functional aging of the brain in older adults.
Yes, walking helps the brain flicker between focused and broader thinking states, facilitating an 'active idle mode' that generates more ideas and creative solutions, even doubling them compared to sedentary states.
People consistently feel better after a walk, often underestimating its positive mood-lifting effects. Increased walking is also associated with a reduced risk of succumbing to major depressive disorder.
Walking is considered one of the lowest-risk, highest-benefit activities, as the rate of injury does not significantly rise per million steps walked, unlike running, which carries a higher risk of injury.
Surprisingly, hunter-gatherer tribes like the Hadza and Tsimane burn approximately the same amount of energy as Westerners. Their better health outcomes are attributed to eating less and consuming minimally processed foods that require more bodily effort to extract calories.
No, an hour of intense exercise cannot fully negate the negative effects of prolonged sitting. The body is designed for distributed activity throughout the day, and a single spike of activity can lead to subsequent exercise-induced inactivity.
Human walking is deceptively complex, requiring a long learning period in infancy to develop balance, range, and movement across varied terrain, a training phase that current robots do not typically undergo.
If listening to a podcast or music encourages you to walk for an hour instead of sitting, it's beneficial. However, if you are trying to problem-solve or engage in quiet self-reflection, walking without auditory distraction might be more effective.
23 Actionable Insights
1. Prioritize Sleep & Walking
Prioritize getting lots of proper quality sleep and engaging in ample walking, as these are the two most important things you can do for both your mental and physical health.
2. Walk for Brain Anti-Aging
Engage in regular walking, even just three times a week for about a mile and a half, to improve memory and attention, increase hippocampal volume, boost BDNF, and functionally reverse brain aging.
3. Walk to Boost Mood
Go for a walk for at least 20 minutes to reliably elevate your mood, as people consistently underestimate the significant positive emotional impact of walking.
4. Walk to Prevent Depression
Increase your daily walking activity to significantly reduce your risk of developing major depressive disorder, as the risk falls with every level of walking above sedentary.
5. Integrate Movement Throughout Day
Distribute physical activity throughout your entire day, rather than concentrating it into a single intense session, as humans are designed to move about more or less every hour for better health outcomes.
6. Prioritize Minimally Processed Foods
Shift your diet away from highly processed foods towards minimally processed options, as these require your body to work harder to extract calories and lead to better health outcomes.
7. Walk for Creativity & Problem-Solving
Before engaging in intellectual or creative tasks, take a short walk (5-10 minutes) to generate on average twice as many new ideas and enhance problem-solving capabilities.
8. Aim for 15,000-17,000 Daily Steps
Aim to walk 15,000 to 17,000 steps every day, as this is a level the neuroscientist guest believes everyone should be doing for broad benefits beyond just fitness.
9. Use Active Idle Thought
When facing a problem or writer’s block, go for a walk to engage in an ‘active idle mode of thought,’ allowing your brain to rhythmically focus and defocus on the problem, which can lead to solutions.
10. Walk Without Auditory Distraction
When trying to solve a difficult problem or engage in deep self-reflection during a walk, avoid auditory distractions like podcasts or music to allow for clearer thought processes.
11. Track Daily Steps
Use a pedometer or smartphone app to track your daily steps, as this helps you become more conscious of your activity levels and how they correlate with your well-being, given that humans are not good at remembering this data otherwise.
12. Keep Comfortable Shoes Handy
Always keep a comfortable pair of walking shoes readily accessible (e.g., under your desk at work) to facilitate spontaneous walks during breaks or lunchtime.
13. Set Movement Alarms
If working at a computer, set an alarm to go off every 25 minutes to prompt you to get up and walk around, effectively breaking up sedentary periods.
14. Park Further Away
When driving to a destination, intentionally park further away than necessary to incorporate extra walking into your daily routine.
15. Get Off Public Transport Early
If using public transport, get off a few stops earlier than your final destination and walk the remaining distance to easily increase your daily steps.
16. Choose Distant Lunch Spots
When getting lunch, choose a slightly more distant shop or restaurant to accumulate an extra 800-1200 steps during your break without much thought.
17. Walk Kids to School
Make a family vow to walk children to school daily, even if it’s a 25-minute journey, to integrate more movement into daily routines and set a positive example.
18. Eat Whole Fruit, Not Smoothies
Choose to eat whole fruits instead of drinking smoothies, as eating whole fruit requires your body to work harder to extract calories, which is better for your health.
19. Prioritize Movement Over Convenience
Make a conscious rule to avoid outsourcing physical activity to machines or electronic appliances whenever possible, choosing stairs over escalators or walking instead of driving short distances.
20. Walk for Anti-Inflammatory Effects
Engage in prolonged periods of walking, such as several weeks in nature, to significantly reduce inflammatory factors in the blood, which can contribute to overall health and potentially mitigate inflammation-related conditions.
21. Advocate for Walkable Environments
Advocate for urban planning that prioritizes pedestrians by making cities and towns ’easy’ (accessible, safe, enjoyable) for walking, viewing streets as destinations rather than just thoroughfares.
22. Join Podcast Community Meetups
Join the Dr Chatterjee Four Pillar Community Tribe on Facebook to connect with other listeners, discuss podcasts, and potentially arrange or start local in-person meetups to share insights and inspire better choices.
23. Wear Minimalist Walking Shoes
Consider wearing minimalist shoes, like Vivo Barefoot, for walking to help transition to minimalist footwear and better connect with your feet and the ground.
7 Key Quotes
So in a very important sense, you've reversed the functional aging of the brain.
Shane O'Mara
So walking is this astonishing capacity that all humans have. It's kind of like the superpower that we have that we've overlooked.
Shane O'Mara
We are designed to conserve the energy that we've harvested because, you know, we're waiting for the lean times that will come. And we've engineered our world so that those lean times don't happen anymore.
Shane O'Mara
It's one of the lowest risk, but also highest benefit activities that exist.
Shane O'Mara
I like to suggest that you only get old when you stop walking. You don't stop walking because you're old.
Shane O'Mara
The two things that will do the best for your mental health and for your physical health is to get lots of walking in, get lots of proper quality sleep.
Shane O'Mara
We persistently underestimate how good a walk will make us feel.
Shane O'Mara
2 Protocols
Creative Problem-Solving Protocol
Shane O'Mara- Write down a few bullet points of the problem or task you're trying to do to organize your thoughts.
- Put the notes down and go for a walk.
- Allow your deeply clever brain to work on the problem in the background.
- Return to the task; new ideas or solutions will often emerge.
Integrating More Walking into Daily Life
Shane O'Mara- Always have a comfortable pair of shoes readily accessible (e.g., keep runners under your desk if wearing high heels to work).
- Set your computer alarm to go off every 25 minutes to prompt you to get up and walk around.
- If you have to drive somewhere, park as far away as reasonably possible and walk the extra distance.
- If taking the train to work, get out two stops early and walk the remaining distance.
- When going out for lunch, don't go to the closest shop; try to find somewhere new that's a little bit further away to accumulate extra steps.