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

KEYPOINTS

• 01

  Your brain can change in both directions throughout adult life

  Neuroscientist Dr. Wendy Suzuki, dean of NYU's College of Arts and Science, defines brain plasticity as the brain's ability to change and grow in response to its environment. Positive plasticity means more connections between existing neurons and, in the hippocampus, brand-new cells. Negative plasticity means shrinkage and lost function, and she names chronic stress and chronic anxiety as the most common drivers. Her goal for every student is a "big fat fluffy brain" with constant positive plasticity.

• 02

  The hippocampus can grow new cells in adulthood

  The hippocampus, critical for forming and keeping long-term memories, is one of only two areas of the human brain where new cells are born in adulthood. Everyone grows some, but physical activity increases how many are born. Suzuki describes these new cells as "teenage" cells: hyperactive and eager to join memory circuits, which makes the whole hippocampus work better.

• 03

  Every bout of movement releases a neurochemical "bubble bath"

  Each time you move, Suzuki says, your brain gets a flood of dopamine, serotonin, noradrenaline, endorphins and growth factors. The first three lift mood; the growth factors travel to the hippocampus and drive new cell growth. The key takeaway she repeats: the flood starts with a 10-minute walk. Getting your heart rate up does more, but you do not need a marathon to start.

• 04

  Movement uses the same chemistry as common mood medications

  Suzuki notes that the most commonly prescribed drugs for depression and anxiety work through noradrenaline, dopamine and serotonin, the same chemicals movement releases. That is why a short walk can ease anxiety. Mel adds that medications save lives and are an important tool, and the point is not to shame anyone but to remember the one your body makes for free.

• 05

  Focus is the most reliably reported brain benefit of exercise

  Improved focus is the easiest effect to find in studies, linked to the prefrontal cortex. The exact mechanism is less clear than for the hippocampus; researchers think growth factors build new synapses rather than new cells there. You get an immediate focus bump from a 10-minute walk, and with regular long-term exercise your baseline focus and attention rise.

• 06

  Exercise feeds its own motivation

  One of Suzuki's favorite findings: people assigned to exercise conditions became more motivated to exercise. She attributes the energy boost Mel feels after workouts most likely to the same dopamine and serotonin surge, since reward and good mood feel energizing.

• 07

  Aerobic activity is the key for memory

  Growth factors for hippocampal growth come from muscle movement and from ketones released by the liver, so you need enough movement to raise your heart rate: dancing and power walking count. The benefit is to forming new long-term memories for facts and events, and to spatial memory, such as finding your way to the subway or learning a new route.

• 08

  Exercise stocks up the brain areas most vulnerable to aging

  The prefrontal cortex and hippocampus are the regions most susceptible to aging and neurodegenerative disease. Regular aerobic exercise makes them as robust as possible. Suzuki is careful: it does not cure aging or dementia, it helps stave them off. Her own research is mostly in younger people because the longer you move, the better off your brain is later.

• 09

  It is never too late to start

  Suzuki points to people with mild cognitive impairment who show improvement once put on an exercise program. For anyone who has not moved in decades, start with what you already do: walk more, park farther away, take the stairs, walk with a friend or pet, or walk around a museum you love.

• 10

  Social connection matters most for longevity

  On living longer, Suzuki defers to Harvard's Robert Waldinger, whose research points to social connection as the number one factor, with heart-rate-raising activity also lowering cardiovascular risk. Her advice is to stack the effects: walk with a friend.