Rhonda Patrick· PhD
Aerobic exercise protects the brain from the age-related loss of myelin, which is crucial for efficient communication between neurons and maintaining cognitive clarity.
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The headline is broadly defensible, but the qualifications matter. Effect sizes vary by population, the strongest claims rest on shorter trials, and credible voices push back on how it's typically framed.
Aerobic exercise protects the brain from the age-related loss of myelin, which is crucial for efficient communication between neurons and maintaining cognitive clarity.
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This relationship was more robust in middle-aged and older adults, emphasizing the critical role of fitness in preserving brain health as we age.
In a new study, higher fitness levels were strongly linked to better myelin integrity in the brain across nearly all of the brain regions studied, with those in poor fitness showing worse myelination.