Cognitive decline, including memory loss, is one of the top fears among people over the age of 55.

More than half of baby boomers fear the loss of mental capacity, and 41 percent are afraid their brain fitness has decreased in the past 10 years, according to a 2010 report in Today’s Dietitian.

There are easy lifestyle choices you can make every day to sustain your mental edge as you age.

• Give your brain a workout. Exercise helps maintain a healthy body and brain. Research has found associations between physical activity and reduced risk of cognitive decline.

Give your body and brain a workout by engaging in physical activities at least 30 minutes every day.

• Nourish your mind. Protect brain cells from memory loss by following a diet rich in good fats such as DHA, a major structural fat accounting for up to 97 percent of the omega-3 fats in the brain. DHA intake has been associated with a decreased risk of mental decline associated with aging.

Another easy way to get it is by taking a daily DHA supplement, clinically shown to improve memory in adults over 55, according to a study published in Alzheimer’s & Dementia: The Journal of the Alzheimer’s Association.

• Activate your mind. Brain cells can grow bigger and stronger with cognitive challenges and stimulation. Pursuing education, learning a new language, reading and working crossword puzzles are fun ways to exercise your mind.

By giving your brain a little more attention, you’ll not only lead a fuller life, but you’ll also be helping to keep your mental edge.