Huberman Lab

Essentials: Tools to Boost Attention & Memory | Dr. Wendy Suzuki

January 15, 2026

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  • Memory formation relies on four key elements: novelty, repetition, association, and emotional resonance, with the hippocampus being the critical structure for long-term memory and imagination. 
  • Aerobic exercise releases Brain-Derived Neurotrophic Factor (BDNF) via myokines from muscles and ketones from the liver, which stimulates the growth of new neurons in the hippocampus, offering protection against cognitive decline. 
  • The top three actionable tools to immediately boost attention and cognitive function are regular exercise, brief daily meditation (around 10-12 minutes), and prioritizing sufficient sleep. 

Segments

Memory Basics and Hippocampus
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(00:00:29)
  • Key Takeaway: The hippocampus is essential not only for remembering past facts and events but also for imagining future or novel situations.
  • Summary: Four factors make moments memorable: novelty, repetition, association, and emotional resonance, which activate the amygdala to enhance hippocampal function. The hippocampus, shaped like a seahorse, is the key structure for long-term memory formation. Damage to the hippocampus, as seen in patient HM, results in an immediate loss of the ability to form new memories for facts and events.
Exercise Effects on Cognition
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(00:08:10)
  • Key Takeaway: Personal experience demonstrated that incorporating regular exercise significantly improved focus, attention, and hippocampal-dependent memory tasks like complex grant writing.
  • Summary: Dr. Suzuki’s personal shift from workaholism to regular exercise led to noticeable improvements in focus and memory needed for writing NIH grants on hippocampal function. Exercise releases neurochemicals like dopamine and serotonin, but critically, it releases Brain-Derived Neurotrophic Factor (BDNF), which promotes the growth of new brain cells in the hippocampus. Regular exercise builds a larger, ‘fluffier’ hippocampus, potentially delaying the onset of age-related memory diseases like Alzheimer’s.
Minimum Exercise for Cognitive Boost
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(00:16:55)
  • Key Takeaway: A minimum of 10 minutes of walking outside provides an immediate mood shift via dopamine and serotonin release, while cardiovascular exercise is required for long-term hippocampal benefits.
  • Summary: Cardiovascular exercise, regardless of the specific type (running, kickboxing, etc.), increases blood flow to the brain and stimulates BDNF release through two pathways: myokines from muscles and beta-hydroxybutyrate from the liver. For immediate mood effects, 10 minutes of walking is sufficient, but achieving hippocampal growth requires sustained cardio workouts. The best time for exercise is often in the morning, right before demanding cognitive tasks.
Exercise Dosage and Cognitive Gains
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(00:27:56)
  • Key Takeaway: For adults in their 30s to 50s who are low fit, exercising two to three times a week for 45 minutes significantly improves mood, body image, and hippocampal-dependent memory tasks.
  • Summary: A longitudinal study on Swedish women showed that high fitness levels in their 40s correlated with nine more years of good cognition later in life. For low-fit individuals, three months of two to three 45-minute cardio sessions per week improved mood and performance on recognition and spatial episodic memory tasks. Furthermore, increasing exercise frequency from mid-fit levels (2-3 times/week) up to seven times a week resulted in continuous, dose-dependent improvements in mood and hippocampal memory.
Affirmations and Meditation Benefits
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(00:35:29)
  • Key Takeaway: Combining physical movement with positive spoken affirmations, as in the Intensati method, enhances mood by counteracting negative self-talk alongside the exercise-induced neurochemical boost.
  • Summary: Positive spoken affirmations, especially when integrated into physical movement, change mood by habituating the individual to positive self-statements, revealing underlying negative self-talk. A 12-minute daily body scan meditation practiced for eight weeks significantly decreased stress response, improved mood, and enhanced cognitive performance. Meditation’s primary benefit is building the skill of focusing attention on the present moment, reducing worry about the past or future.
Top Tools for Attention
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(00:39:38)
  • Key Takeaway: The three most potent tools for immediately increasing the capacity to attend are exercise, meditation, and prioritizing high-quality sleep.
  • Summary: Exercise directly improves the functioning of the prefrontal cortex, which governs attention. Meditation practice enhances the ability to focus, particularly on the present moment. Sleep is fundamentally important for all core cognitive functions, including attention, creativity, and general brain performance.