Insight by Science
High-intensity interval training produces longer-lasting hippocampal gains than steady moderate aerobic work because larger acute stress responses like cortisol, catecholamines, and lactate trigger release of plasticity factors that drive hippocampal maintenance and structural remodeling.
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See all →Resistance training supports white matter health because it raises circulating IGF-1, a growth factor that promotes myelination and helps preserve the integrity of executive function networks.
Training that boosts processing speed reduces long term dementia risk because forcing faster visual and auditory processing strengthens cortical networks vulnerable in dementia, and periodic booster sessions help sustain those protective gains.
Vaccination against viruses such as shingles could lower dementia risk because preventing viral reactivations and shifting immune responses may reduce chronic neural inflammation that contributes to neurodegeneration, though current evidence is observational and does not prove causality.
Avoiding major illnesses and hospitalizations lowers long term dementia risk because acute medical events produce inflammatory, metabolic, and stimulation losses that cause stepwise cognitive drops and erode cognitive reserve.
Having a phone nearby reduces thinking performance because cues tied to notifications condition the brain to monitor for interruptions, which steals attention and cognitive flexibility even if the device is off or tucked away.
Testing biomarkers like vitamin D, iron, omega-3 index, homocysteine, and B12/folate and correcting deficiencies is a smarter cognitive health strategy because targeted supplementation fixes biochemical deficits that directly affect brain function, whereas blanket high dose supplements often add no benefit when levels are already adequate.
B vitamin supplementation slows cognitive decline only when omega-3 status is adequate because methylation pathways and structural lipid availability are interdependent, so fixing one pathway without sufficient substrate in the other can leave brain maintenance pathways blocked.
Very high volume or extreme training impairs immediate cognitive function because exhaustive exercise depletes energy reserves and pushes stress hormones to maladaptive levels that disrupt neural processing and learning.
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