1. Keep up with your fitness level to enhance brain activity 

A research found that brain function, associated with higher cardiorespiratory fitness has an important role in increased cognitive performance in older adults. 

Scientists revealed that higher cardiorespiratory fitness and dual-task performance is associated with dual-task processing in a core executive function in a brain.

As we age, there is a decline in brain function, including memory and our brain's ability to process information. But the results of the research has found that higher levels of cardiorespiratory fitness in older adults lead to better executive function in the brain, which helps with reasoning and problem-solving. The conclusion was that with higher cardiorespiratory fitness levels, there was an increase in brain volume of key brain regions.

In another study from the Michigan State University, researchers suggest by involving in aerobic fitness, long-term memory can be enhanced.

Scientists in this one-of-the-kind study investigated young, supposedly healthy adults and found that there is more memory loss in lower-fit individuals across time.

2. Fit brain may lead to visual memory improvement

Results of a commercial brain fitness program have shown an improved memory in older adults, within days after training. 

Practicing simple visual tasks also helps to improve the accuracy of short-term, or "working" visual memory, according to the study.

The findings are the first to study and measure both mental performance and changes in neural activity caused by a cognitive training program.

3.Exercise your body for a younger and active brain 

Physical fitness affects our mental fitness, especially as we get older.

Scientists in a study found that the fitter men were better performers mentally than the less fit peers. They also discovered that fitter men used parts of their brains in the same way as in their youth.

4. Fitter adults has greater brain activity while learning

Researchers from the Boston University found that fitter older adults keep their brains in good shape as well. Older adults with higher cardiorespiratory fitness (CRF) tests score performed better on memory tasks than those who had low CRF.

The results concluded that the more fit older adults were, the more active their brain was during learning.