How do I best protect my brain from cognitive decline? Louisa Nicola is a neurophysiologist and the founder of Neuro Athletics, specialising in brain health, human performance, and longevity. In this Moment, Louisa Nicola reveals how the right kind of exercise can help protect the ageing brain, why one often-overlooked measure of physical strength may be a powerful marker of cognitive health, and the training approach linked to remarkable changes in the middle-aged heart. Listen to the full episode here! Spotify: https://g2ul0.app.link/FCjUBa95n5b Apple: https://g2ul0.app.link/jJOy01c6n5b Watch the Episodes On YouTube: https://www.youtube.com/c/%20TheDiaryOfACEO/videos
In people with mild cognitive impairment, resistance training was presented as one of the highest return interventions. The cited SMART trial linked regular strength training to preserved cognition and better processing speed.
As context for Alzheimer's, the discussion distinguishes gray matter from white matter. Strength training was described as helping slow gray matter decline linked to aging and cognitive disease.
On inherited risk, APOE4 was framed as a major Alzheimer's risk factor but not a certainty. Risk rises with one or two copies, and the speaker says women face a larger increase than men.
Using a twin study, stronger legs and greater leg power were linked to larger brain volume and better cognitive outcomes. The point was that lower-body strength may strongly reflect brain protection.
For brain benefits, the speaker argues that lifting heavy is more effective than light loads. The claim is that high effort recruits more neural drive and produces stronger brain-related adaptations.
During muscle contraction, exercise releases myokines that signal to the brain. These were described as supporting cognition, lowering inflammation, and helping generate new neurons in the hippocampus.
A key mechanism discussed is BDNF, a growth factor increased by exercise. It was linked to neurogenesis in the hippocampus, the memory-related region that is affected early in Alzheimer's.
Beyond brain health, exercise was described as lowering cancer risk through immune and anti-inflammatory effects. Natural killer cells and myokines were highlighted as possible mediators.
If limited to one exercise, the speaker chose the deadlift. The reason given was that it challenges much of the body at once and may deliver broad neural and muscular benefits.
A person can still be at risk even if they exercise but sit for most of the day. The discussion says prolonged sitting harms metabolic and cardiovascular health despite meeting workout targets.
As a practical fix, the speaker recommends brief movement breaks such as 10 air squats every hour. This was framed as a way to counter glucose spikes and reduce sedentary damage.
The conversation contrasts steady zone 2 work with harder efforts. While all movement was considered helpful, the speaker emphasized higher intensity intervals as more efficient for some brain and heart outcomes.
Running outside was described as offering added cognitive stimulation. The idea is that movement plus visual, auditory, and environmental input may engage more of the brain than indoor cardio.
High intensity cardio was tied to major cardiovascular adaptations. A cited study suggested that a structured weekly program over two years could make sedentary middle-aged hearts function more like much younger ones.
For improving VO2 max, the speaker recommends the Norwegian 4x4 protocol. It involves repeated four-minute intervals near 90 to 95 percent effort with recovery periods between rounds.
The discussion stresses that midlife may be the best window to change long-term brain and heart outcomes. After a certain age, some tissues may become less able to remodel.
High blood pressure was described as a direct threat to the brain's tiny vessels. Damage to these capillaries may reduce oxygen delivery, weaken the blood-brain barrier, and accelerate cognitive decline.
A practical prevention tool discussed is regular blood pressure monitoring. The speaker argues that controlling hypertension through lifestyle or medication can help preserve cognition and brain structure.
The conversation clarifies that people often do not die from memory loss itself. Late-stage Alzheimer's can lead to fatal complications such as swallowing failure, falls, and progressive loss of basic functions.
If diagnosed, the speaker would still pursue aggressive lifestyle measures. Exercise, dietary control, lipid management, omega-3 intake, ketone support, and social and cognitive engagement were all presented as ways to preserve function.
In Alzheimer's, the brain was described as losing efficiency with glucose. Ketones were presented as an alternative fuel source that may help support brain energy during this metabolic crisis.