A recent review links aerobic exercise to rises in BDNF and regular resistance work to IGF-1 — two molecules tied to brain health — and offers simple, evidence-aligned steps to make workouts more brain-supportive.
It also changes what's happening in your brain, which may help explain why regular movement is linked to better cognitive health as we age.
A recent review of exercise research 1 looked at how different forms of exercise affect the brain across the lifespan.
The research pointed to aerobic exercise at roughly 65% or more of your max effort, two to three times a week, with sessions lasting at least 40 minutes, as a pattern associated with a stronger BDNF response.
# Why this matters Exercise affects more than muscles. A recent review of human, observational, and animal studies focused on two molecules — BDNF and IGF-1 — that help explain how movement supports the brain across life. BDNF supports healthy brain cells and plays a role in learning and memory. IGF-1 helps maintain and support brain tissue. The review found aerobic and resistance exercise influence these molecules differently, suggesting a combined approach better supports cognitive health.
# What the review found
# Practical routine based on the evidence You don't need elaborate testing to follow these findings. Use the review's patterns as a framework:
# How to measure effort and consistency
# Bottom line
Your workout could be helping your brain in more ways than one.
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Your brain may get a little more switched on after a walk than you realize.
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