I am trying to be more concentrated, to have a better memory, to make better decisions, to resist pressure without getting distracted. I look for these qualities in applications, work techniques or supplements. But the answer best documented by science is much simpler: move.
The link between physical activity and cognitive performance is one of the most active areas of neuroscience research. The conclusions are consistent and spectacular: regular physical exercise improves memory, concentration, executive functions and slows age-related cognitive decline. Here's how, and above all how to take advantage of it on a daily basis.
1. What exercise does to the brain: the mechanisms
2. Immediate effects: what changes in the hours following exercise
One of the most practical aspects of research on exercise and cognition is the demonstration of immediate and measurable effects in the hours following physical exertion:
- ●Working memory: a single 20-minute aerobic exercise session improves working memory (ability to maintain and manipulate information in real time) measurably in the following 2 hours.
- ●Information processing speed: psychomotor tests carried out 30 minutes after moderate exercise show an improvement of 10 to 15% in reaction speed and information processing.
- ●Creativity and divergent thinking: a Stanford study (Oppezzo & Schwartz, 2014) shows that walking increases creative thinking by 81% on average, the effect persisting even after walking stops.
- ●Executive control: executive functions (planning, cognitive flexibility, inhibition) are improved for up to 1 hour after moderate exercise of 20 to 30 minutes.
Practical implication: a 20-minute walk before an important meeting, an exam or a demanding cognitive task objectively improves my performance in the hours that follow.
3. Long-term effects: building a resilient brain
Beyond the immediate effects, regular practice structurally transforms the brain:
- ●Hippocampal volume: a randomized study published in PNAS (Erickson et al., 2011) on 120 sedentary adults shows that a 12-month aerobic exercise program increases hippocampal volume by 2%, reversing age-related loss by one to two years.
- ●Cortical thickness: active people have greater cortical thickness in the frontal and parietal regions linked to executive functions, even among seniors.
- ●Brain connectivity: functional MRI shows better connectivity of brain networks involved in attention, memory and decision-making in physically active people.
- ●Cognitive reserve: regular physical activity throughout life constitutes cognitive reserve, a capacity of the brain to compensate for damage linked to aging and neurodegenerative diseases.
4. Prevention of cognitive decline and neurodegenerative diseases
Physical activity is today the best documented preventive intervention against age-related cognitive decline and neurodegenerative diseases. A meta-analysis published in The Lancet (2020) identified physical inactivity as the second most modifiable risk factor for Alzheimer's disease (after low education).
5. Move to work better: practical implications
This data has direct implications for how I organize my work days to maximize my cognitive performance:
- ●Pre-task active break: 20 minutes of walking before a demanding cognitive task (meeting, writing, analysis) improves performance in the following hours.- Sports in the morning: studies show that morning exercise produces peaks of BDNF and dopamine which improve cognitive performance throughout the morning.
- ●Active micro-breaks: 5 minutes of movement every hour maintain cerebral blood flow and prevent the drop in concentration linked to prolonged sedentary lifestyle.
- ●Walking for calls and brainstorming: walking during phone calls or brainstorming sessions increases creativity and the quality of ideas generated, documented Stanford effect.
A health check-up allows me to assess the markers of cerebral and cardiovascular health which will condition my cognitive performance in the long term. Investing in my physical activity today means investing in the quality of my intellectual functioning in the decades to come. 14px;font-weight:700;color:#006064;font-size:1.1rem">💡 Tips to remember
- A single 20-minute walking session improves working memory and executive functions for 1 to 2 hours. Walking before a meeting or an important cognitive task gives yourself a measurable advantage.
- Walking increases creative thinking by 81% on average, an effect that persists even after walking stops (Stanford, Oppezzo & Schwartz 2014 study).
- 12 months of regular aerobic exercise increases hippocampal volume by 2%, reversing age-related loss by one to two years, a direct protection against memory decline.
- Physical inactivity is the second largest modifiable risk factor for Alzheimer's disease. Regular physical activity reduces the risk of developing this disease by 30 to 45%.
- A health check-up makes it possible to assess the markers of cardiovascular and metabolic health which determine long-term brain health. Investing in your physical activity means investing in your cognition.
