A clinical trial shows exercise and healthy habits can slow cognitive decline. It’s known that aging often brings concerns about memory loss and brain health, that’s why many people worry about dementia and wonder what they can do to protect their minds. A new clinical trial from the United States offers hope: regular exercise, healthy eating, and simple lifestyle changes may help slow cognitive decline in older adults who are at risk of dementia. So, let’s see what seniors should do.

What the clinical trial studied

This clinical trial, funded by the Alzheimer’s Association and published in JAMA Network, followed more than 2,100 adults between the ages of 60 and 79. None of the participants had dementia at the beginning, but all carried risk factors such as:

A sedentary lifestyle (not being active enough).
Unhealthy diet.
High blood pressure.
Diabetes.
Family history of memory problems.

The goal was to see if structured lifestyle changes could improve brain function and protect memory.

Two groups, two different approaches

The participants were split into two groups:

General health group: This group only got basic advice about exercising, eating well, checking blood pressure, and staying socially active. They met with the program just six times in two years.
Intensive program group: This group followed a much more structured plan. They attended 38 meetings, did four aerobic workouts each week, added strength and balance training, and followed a healthy diet based on the Mediterranean and DASH styles. They also practiced brain-training exercises and received one-on-one health coaching.

The results

After two years, both groups had better brain function. The biggest improvements were in:

Executive function: skills like planning, organizing, and making decisions.
Processing speed: how fast the brain can understand and respond to information.

The group that followed the intensive program did a little better, but not by much. This shows that even smaller, easier changes to daily habits can still make a real difference.

It’s especially important that even people with the APOE gene—known to increase the risk of Alzheimer’s—still showed improvements. This means that healthy lifestyle changes can help almost everyone, no matter what their genes say.

What seniors can do now

The main lesson from this clinical trial is that small changes, done regularly, can make a big difference. Seniors don’t need to change everything at once—what really matters is creating healthy habits and keeping them over time. The study pointed out five habits that are especially useful:

Stay physically active: Try activities like walking, swimming, or cycling for aerobic exercise. Add strength and balance training to support overall health and reduce fall risk.
Eat a brain-healthy diet: Follow eating patterns like the Mediterranean or DASH diet. Focus on vegetables, fruits, berries, whole grains, nuts, legumes, and olive oil. Limit processed foods and added sugars.
Challenge your mind: Keep your brain active with puzzles, memory games, reading, or learning new skills. These activities strengthen neural pathways and improve resilience.
Watch your health: Regularly check your blood pressure, cholesterol, and blood sugar, especially if you have conditions like high blood pressure or diabetes. Taking care of these helps both your heart and brain.
Stay connected: Spend time with family, friends, or community groups. Being social helps fight loneliness, which can speed up memory loss.

Why this clinical trial matters

Dementia is one of the biggest health concerns facing aging populations worldwide. While there is no guaranteed way to prevent it, this clinical trial shows that lifestyle changes can slow cognitive decline and improve quality of life.

This clinical trial also shows that brain health isn’t just determined by genetics. Even if someone has a higher risk, everyday choices—like staying active, eating nutritious foods, and keeping social connections—can boost memory and decision-making.

The important thing to remember is that it’s never too late to start. Small, steady actions build up over time, and with consistency, they can slow cognitive decline and help keep the mind sharp and healthy well into later life.