Physical activity is one of the few interventions shown to increase levels of BDNF (brain-derived neurotrophic factor), a protein that supports the growth of new neurons and strengthens connections between existing ones.
Not just cardio
While aerobic exercise has the strongest evidence base for cognitive benefits, strength training and even brisk daily walking show measurable improvements in attention and processing speed over time.
How much is enough
Consistency tends to matter more than intensity — moderate movement most days of the week outperforms occasional, exhausting workouts when it comes to sustained cognitive benefit.
A practical starting point
If a formal exercise routine feels daunting, a 20-minute daily walk is a well-supported, low-barrier place to start, and it stacks naturally with other healthy habits like morning sunlight exposure.
As walking becomes more comfortable, you can gradually increase the pace, distance, or duration based on your fitness level. Adding simple activities such as gentle stretching, bodyweight exercises, cycling, swimming, or recreational sports can help introduce variety while working different muscle groups.
Consistency matters more than intensity when building a lasting movement habit. Short periods of activity throughout the day can also add up, especially if long periods of sitting are broken up with brief walks or movement breaks. The goal is to find forms of movement that feel manageable and enjoyable enough to continue regularly.
