New Delhi, January 4, 2026

Ageing is unavoidable, but losing mental sharpness does not have to be part of growing older. A senior heart surgeon with more than 25 years of medical experience says that simple lifestyle choices, practiced consistently over time, can help protect brain health and slow age-related cognitive decline. The advice comes from Dr Jeremy London, a board-certified cardiothoracic surgeon, who recently shared evidence-backed strategies aimed at preserving memory, focus, and overall brain function as people age.

Dr London addressed the common belief that cognitive decline is an inevitable part of ageing and explained that research now tells a different story. According to him, while ageing itself cannot be stopped, the pace at which the brain ages can be influenced. He referred to large international studies, including the Finnish FINGER trial and the SMARRT trial, which show that lifestyle changes adopted early and followed long term can reduce the risk of cognitive decline later in life. These studies focus on what researchers call a “multi-domain approach,” meaning that several habits work together to protect the brain rather than relying on a single solution.

The doctor emphasised that no one habit acts as a magic shield. Instead, it is the combined effect of multiple healthy behaviours that makes a real difference over time. He encouraged people to think of life as having a “second curve,” where intentional choices made in midlife and beyond can support mental clarity and independence in later years.

One of the most important habits Dr London pointed out is regular movement. Physical activity, especially aerobic exercise like walking, cycling, or swimming, along with resistance training, does more than strengthen muscles. It also supports blood flow to the brain, helps reduce inflammation, and promotes the growth of new brain connections. According to him, moving the body regularly is one of the most reliable ways to protect long-term brain function.

Another key factor is keeping the brain active. Dr London explained that mental stimulation helps maintain cognitive skills such as memory, attention, and problem-solving. Activities like reading, solving puzzles, playing strategy-based games, or learning new skills encourage the brain to stay flexible and engaged. These habits challenge the brain in healthy ways and may delay age-related decline when practiced consistently.

Social connection was highlighted as another powerful but often overlooked factor. Dr London warned that social isolation can speed up cognitive ageing. Humans are social by nature, and meaningful relationships help keep the brain active and emotionally balanced. Regular interaction with family, friends, or community groups can provide mental stimulation, reduce stress, and support emotional health, all of which are closely linked to brain function.

The fourth habit focuses on cardiovascular and metabolic health. Dr London explained that the brain depends on a healthy heart and blood vessels to function well. Managing blood pressure, blood sugar levels, cholesterol, and overall metabolic health can reduce the risk of damage to brain cells over time. Simply put, what supports heart health also supports brain health, making routine check-ups and healthy daily choices especially important.

Dr London summed up his message by reminding people that while ageing cannot be stopped, mental decline is not guaranteed. He stressed that small, consistent actions taken every day can add up to lasting benefits. By staying active, mentally engaged, socially connected, and mindful of heart health, individuals can improve their chances of staying mentally sharp well into older age. In his words, the goal is not to avoid ageing, but to age with clarity, resilience, and intention—because the brain, like the rest of the body, responds to how it is treated over 

 Heart Surgeon Highlights Four Everyday Habits That Can Help Slow Age-Related Cognitive Decline

Ageing is a natural part of life, but losing mental sharpness does not have to be. Dr Jeremy London, a board-certified cardiothoracic surgeon with over 25 years of experience, says that the way we live each day can strongly influence how our brain ages. In a recent Instagram video shared on January 3, Dr London explained that cognitive decline is not inevitable and that simple, consistent lifestyle habits can help protect brain health over time.

He referred to major scientific studies, including the Finnish FINGER trial and the SMARRT trial, which show that a combination of healthy habits works best when it comes to slowing age-related cognitive decline. According to Dr London, there is no single habit that can save the brain on its own. Instead, it is the combined and long-term effect of several small choices that truly makes a difference.

One of the most important habits he highlights is regular movement. Activities like walking, cycling, strength training, or any form of exercise help improve blood flow, support brain cells, and keep the mind sharp. Physical activity, he explains, is just as important for the brain as it is for the body.

Dr London also stresses the importance of keeping the brain active. Reading, solving puzzles, playing games, or learning something new can help maintain memory, focus, and thinking skills as we grow older. Mental engagement keeps the brain flexible and strong.

Social connection is another key factor. Isolation can speed up cognitive decline, while meaningful relationships help slow it down. Spending time with friends, family, or community groups supports emotional and mental health.

Finally, Dr London points out that heart health and brain health are closely linked. Managing blood pressure, blood sugar, and overall metabolic health benefits both the heart and the brain.

His message is clear: ageing is unavoidable, but mental decline does not have to be. Intentional daily choices can help create a healthier, sharper second phase of life.