Change Your Brain: #1 Neuroscientist’s Exercise Protocol for Peak Energy and Focus

High-Level Overview

Mel Robbins welcomes Dr. Wendy Suzuki, a neuroscientist and dean of the College of Arts and Sciences at New York University, whose research focuses on memory, brain plasticity and what physical movement does to the brain. The episode is a friendly, energetic tour of why the brain deserves the same care we give our diet or our muscles, and what small, free actions (a short walk, regular aerobic exercise, a blast of cold water at the end of a shower) can do for mood, energy, focus and memory.

The tone is exuberant and personal. Suzuki tells how one professor with a hat box set her on her career, how overwork and loneliness led her to the gym and then to a new line of research, and, in the most emotional stretch of the hour, how her father's dementia diagnosis moved her to ask her parents whether they could start saying I love you. She also brings a real preserved human brain into the studio and puts it in Robbins's hands. The conversation moves from origin stories to a hands-on anatomy lesson, then to practical exercise guidance, and ends with a family story that brings both women to tears.

The Discussion Explores:

• What brain plasticity is, and why it can run in a positive or a negative direction
• How Marian Diamond's enriched-environment experiments inspired Suzuki to become a neuroscientist
• Suzuki's own turnaround from an isolated, overworked academic to someone who studies and teaches exercise
• A guided look at a real human brain: lobes, visual cortex, cerebellum, hippocampus, amygdala and brain stem
• The flood of neurochemicals released by movement, starting with a 10-minute walk
• How exercise affects focus, energy and memory, and how much is enough according to her lab's studies
• Hot-cold contrast showers as a natural adrenaline boost
• Dementia, social connection, and why an emotionally charged moment stuck in her father's failing memory

Deep Dive into Main Ideas

A Big, Fat, Fluffy Brain

Suzuki describes herself as the brain health dean: her mission is for every student to have what she calls a "big, fat, fluffy" brain. By that she means a brain with constant positive plasticity. Plasticity is the brain's ability to change and grow in response to its environment, and it can go the other way too, with areas shrinking and function fading. Her research for more than 30 years has asked which choices improve the brain's anatomy, physiology and function.

When Robbins asks what growing actually means, Suzuki points to her favorite structure, the hippocampus, which is critical for forming and retaining new long-term memories and is one of only two areas of the human brain where new brain cells are born in adulthood. Physical activity helps more of those cells grow. Positive plasticity also means more connections between existing neurons, which she says correlates with better performance, for example in the prefrontal cortex for focus and attention.

Why care? Because, she says, "the human brain is the most complex structure known to humankind", and she means everyone's brain, not just Einstein's. It holds a person's history and future decisions, so looking after it is looking after who you are. People who make brain health a priority, she says, can expect lower levels of depression and anxiety, more energy, and better focus, memory and creativity, based on studies in animals and humans.

The Hat Box and the Disney World of Rat Cages

Suzuki's origin story begins on her first day as a freshman at UC Berkeley, in a 15-student seminar called The Brain and Its Potential. The professor, whom she likens to a neuroscientific Beyonce, put on gloves, opened a hat box and lifted out a real preserved human brain while the class gasped. That professor was Marian Diamond, who Suzuki says was the first woman to earn a PhD in neuroanatomy at Berkeley.

In the 1960s Diamond and her colleagues showed that the adult mammalian brain can change. Rats housed in an enriched environment, which Suzuki calls "the Disney World of Rat Cages", were compared with rats in something closer to a shoebox. Both groups had free food and water, and the prevailing belief was that the adult brain could not change at all. Instead, the cortex of the enriched rats grew. Suzuki decided on the spot that she wanted to be like Diamond.

From Workaholic to Exercise Researcher

Years later, on the six-year tenure track at NYU, Suzuki's strategy was to do nothing but work: no Broadway, no friends, just the lab. She got tenure, but she was unhappy, lethargic and eating too much takeout. A solo river-rafting vacation in Peru was the turning point. Surrounded by triathletes, she realized she was the weakest person on the trip and came home determined to go to the gym. Regular workouts made her feel better, and the habit grew.

About a year and a half in, sitting at her desk writing a grant, she had a thought she had never had before: that the writing had gone well. Her focus seemed sharper and so did her memory for the details of hundreds of journal articles. The only thing that had changed was her physical activity. That brought her back to Diamond's work, where, she says, the running was what mattered most in those cages: give a rat a running wheel and it gets the vast majority of the positive brain changes. Her gym down the block was her own enriched cage.

To investigate, she created a class called Can Exercise Change Your Brain? and decided to have the students exercise with her so she could test them at the start and end of the semester. When her administrator refused to pay for an instructor, she asked whether the school would pay for her to be trained instead, and it would. She spent six months learning to teach intenSati from Patricia Moreno, a class combining moves from kickboxing, dance, yoga and martial arts with shouted affirmations. A colleague's elective served as the control class. Sweating together for an hour before an hour and a half of discussion dissolved the wall between professor and students and set her standard for engagement. Robbins draws out the lesson that a no often just means finding another way.

Meeting Betty: A Tour of a Real Brain

Suzuki then reveals her own hat box. Inside is a preserved human brain she calls Betty, kept in her department for over 26 years. She says she picks it up with reverence every time because it was someone's life and personality. Robbins, gloved and nervous, finds it heavier than expected, about three pounds, roughly the weight of a quart of milk.

Suzuki parts the two hemispheres to show how deep the folds of the neocortex run; flattened out, she estimates, the sheet would be about as large as the dining table in front of them. A rat's cortex, by contrast, is smooth. She points out the frontal lobe, the parietal lobe for visual-spatial functions, and the occipital lobe at the back, home of the primary visual cortex. Damage there causes blindness, and seeing stars after a knock to the back of the head is that area being physically stimulated. Underneath are the start of the spinal cord, the cerebellum for fine motor movement, the brain stem that controls heartbeat and respiration, and the optic chiasm where visual fibers cross. The hippocampus lies beneath the underside of the temporal lobe, with the almond-shaped amygdala just in front of it.

The Neurochemical Bubble Bath

Every time you move your body, Suzuki says, you release a flood of neurochemicals: dopamine, serotonin, noradrenaline, endorphins and growth factors. She calls it "a neurochemical bubble bath for your brain", and stresses that no marathon is required. It is different when the heart rate goes up, but, in one of her main take-homes, "the neurochemical flood starts with a 10 minute walk". The exact mechanism by which movement triggers dopamine and serotonin is not well known; she thinks about it in evolutionary terms, as a survival mechanism in beings made to move.

This is also why a short walk can ease an anxious mood. She notes that the most commonly prescribed drugs for depression and anxiety act on the same neurochemicals, and that walking is free and requires no change of clothes. Robbins adds that medications save lives and are an important tool, but that people should not forget the one their own body provides. The main drivers of negative plasticity, Suzuki says, are chronic stress and chronic anxiety.

Focus, Energy and the Cold Finish

Improved focus is, according to Suzuki, the most commonly reported benefit in studies of exercise and the brain. It involves the prefrontal cortex, and although the mechanism is less clear than elsewhere, it is thought to involve growth factors and new synapses. A 10-minute walk gives an immediate lift, and regular exercise raises baseline focus and attention over time.

On energy, she cites a favorite finding: people assigned to exercise groups became more motivated to exercise. The post-workout boost Robbins describes is, she suggests, most likely due to dopamine and serotonin. Exercising before a big day also puts you in a good mood, sharpens attention and raises adrenaline. Robbins says that is exactly why she got up at 5:35 that morning.

Suzuki supercharges that with hot-cold contrast showers: a normal hot shower, then the dial pushed to maximum cold at the end. It was hard at first and she stayed only briefly, but she got used to it and now looks for colder water, since the colder it is, the bigger the adrenaline boost. For beginners, she says the point is simply to feel the shock, stay as long as you can handle, then get out; in her experience the lift easily lasts the rest of the morning. Robbins's trick is to switch to cold when rinsing out conditioner, roughly 20 seconds.

Memory, Aging and How Much Exercise

For memory, aerobic activity is the key: anything that raises the heart rate, such as dancing or power walking. Growth factors released through muscle movement and ketones from the liver travel to the hippocampus, where new cells are always being born, and more exercise means more of them. Suzuki compares these newborn cells to teenagers, hyperactive and eager to join memory circuits. The benefit applies to forming new long-term memories for facts and events, and to spatial memory, such as finding your way or learning a route.

She has not studied dementia directly; she works mostly with younger people because the longer and more you move, the better off the brain is in older age. The prefrontal cortex and hippocampus are the areas most vulnerable to aging and neurodegenerative disease, so building them up matters: "I'm not curing aging or dementia, but I'm staving it off." And for anyone who has been sedentary for decades, "it's never too late to start moving"; she notes that people with mild cognitive impairment show improvement when put on an exercise program.

Her lab's numbers: low-fit people, who had exercised less than 20 minutes a week for three months, took a 45-minute spin class three times a week and were compared with a group playing competitive Scrabble on the same schedule. After three months the exercisers showed better mood, better focus and improvements in certain forms of hippocampal function. A second study, of people already working out two or three times a week, let them attend as often as they liked, up to seven times a week, and found that "the more you worked out, the more brain changes you got". Walking, dancing and gardening all count. For people who are injured, unwell or simply out of the habit, she suggests a little more of what they already do: park farther away, take the stairs, walk with a loved one or a pet, or stroll around a museum, choosing something enjoyable enough to keep doing.

Social Connection and Saying I Love You

Asked about longevity, Suzuki defers to her friend Robert Waldinger and the Harvard studies he oversees, which she says show social connection to be the number one factor, with heart-healthy activity also helping. She likes to combine the two by walking with a friend.

Then she tells the story the episode builds toward. Her father, an engineer, drove home from the 7-Eleven eight blocks away and told her mother he had had trouble finding his way back. As a hippocampus expert she knew at once what that meant, and he was later diagnosed with Alzheimer's dementia. He was unsteady on his feet, so beyond walks, what helped was time with family, where he came alive.

As a third-generation Japanese American, she explains, her family never said I love you; it was simply not part of the culture. After the diagnosis she wanted to start, and decided to ask permission on her regular Sunday call. Her mother went silent, then said, "I think that's a great idea." They got through the awkward first exchange, her father agreed too, and she hung up and burst into tears. The following Sunday her father, who by then remembered almost nothing, said it first. Suzuki's explanation as a memory researcher is that emotional resonance makes hippocampus-dependent memories stick, so the moment formed a new memory despite his failing hippocampus. The last time she spoke with him, they said it again.

Conclusion

Suzuki's message is that the brain is changeable at any age and that the tools are free and close at hand. A 10-minute walk starts the neurochemical flood that lifts mood and focus; regular aerobic exercise, three 45-minute sessions a week in her study and more if you can, feeds the hippocampus and prefrontal cortex, the areas most vulnerable to aging; a cold finish to a shower adds energy; and time with people we love protects both longevity and memory. Her father's remembered I love you shows how emotion binds memory, and how one person can change a family's habits. Her parting words to listeners: "you have a beautiful brain".

This is a summary of "Change Your Brain: #1 Neuroscientist’s Exercise Protocol for Peak Energy and Focus" from The Mel Robbins Podcast, giving you the GIST so you can decide if you want the REST. Listen to the full episode.