How Your Brain Builds Mental Toughness
Summary of the video “The Secrets and Science of Mental Toughness | Joe Risser MD, MPH | TEDxSanDiego” by TEDx Talks.
Mental toughness isn't pure willpower—it's rooted in biology. A protein called BDNF acts as fertilizer for your brain, strengthening neurons and resilience. Exercise, especially challenging activities like planks that demand mental focus, raises BDNF most effectively. Even one minute of effort can trigger measurable changes in brain health.
The Plank: A Window Into Mental Toughness
George Hood's Record-Breaking Plank
George Hood held a plank for 10 hours, 10 minutes, and 10 seconds—the world record. He revealed that the plank is 90% mental; he stayed focused by engaging with conversations around him and drawing energy from people nearby, demonstrating that mental distraction and social connection are key to enduring physical challenge.
Grit Is Rooted in Biology, Not Just Willpower
Grit—the mental toughness behind extraordinary achievements—isn't purely psychological. It's grounded in a biological mechanism: a protein called BDNF (Brain-derived neurotrophic factor) that acts as fertilizer for the brain, helping neurons grow, stay healthy, and communicate effectively.
BDNF: The Brain's Fertilizer
What BDNF Does
BDNF is a protein that helps neurons grow, stay healthy, and communicate more effectively. It is crucial for memory and mental resilience—essentially acting as brain fertilizer that strengthens cognitive and emotional capacity.
What Increases BDNF
Multiple factors boost BDNF levels, but exercise is the most powerful. Sunshine and blueberries also increase it, as do antidepressants, but physical activity—particularly exercises requiring mental effort—produces the largest gains.
Mental Effort Matters More Than Physical Exertion Alone
A 2005 study in the journal Hippocampus found that exhausting physical exercises like continuous swimming produced less BDNF than activities requiring mental focus, such as navigating mazes. This shows that cognitive engagement during exercise is critical for BDNF production.
Yoga Produces Highest Measured BDNF
Activities combining physical effort and concentration—like yoga—have produced some of the highest BDNF levels ever measured in humans, making them exceptionally effective for building mental resilience.
Exercise Doubles BDNF Levels
An August 2024 article in Experimental Neurobiology titled 'Modulation of BDNF by Physical Exercise' found that exercise doubled BDNF levels, providing recent scientific confirmation of the protein's responsiveness to physical activity.
Real-World Evidence: From Research to Resilience
Daniel's Extraordinary Plank with CRPS
Daniel suffers from Complex Regional Pain Syndrome (CRPS), one of the most painful diseases known, with no cure. Patients describe sensations like water feeling like hot lead. Despite this, Daniel held a plank for over nine hours on his affected arm—demonstrating that mentally and physically challenging exercise can coexist with severe pain conditions.
Clinical Populations Benefit From Grit Research
The speaker works with medically destitute patients—those who suffered heart attacks or strokes in their 40s, accidents in their 20s, or chronic pain and disability. While a plank alone cannot fix these conditions, understanding grit and BDNF offers potential therapeutic pathways worth studying further.
The Plank as a Research Tool
The speaker is designing a study to investigate whether planks relieve pain in conditions like CRPS. No one has yet studied BDNF levels during a plank, but the combination of mental effort and physical challenge makes it a promising candidate for boosting BDNF and potentially improving quality of life.
The Practical Challenge
One Minute Can Be Transformative
The speaker challenges viewers to do a plank the next time they need more grit—even just one minute. For those unable to get on the floor, a wall plank works. This brief effort can trigger measurable changes in brain health and mental resilience.
Notable quotes
The plank is 90% mental. — George Hood
Think of BDNF as fertilizer for your brain. — Joe Risser MD, MPH
That minute can be transformative. — Joe Risser MD, MPH
Action items
- Next time you need more mental toughness, hold a plank for at least one minute.
- If you cannot get on the floor, perform a wall plank instead.
- Consider adding yoga or other mentally-demanding physical activities to your routine to boost BDNF.
- Stay informed about emerging research on BDNF and exercise as a therapeutic intervention for chronic pain and resilience.