A study by Johns Hopkins Bloomberg School of Public Health researchers found that five minutes a day of light exercise may help prevent dementia, even for frail older adults. A doctor weighed in.

Just five minutes of exercise, that is moderate to vigorous, daily can help the elderly stave off the risk of dementia, according to a study. Researchers from the Johns Hopkins University in the US showed that engaging in as little as 35 minutes of moderate to vigorous physical activity per week,

Dementia benefits from physical exercise, and even brief periods of activity that people may dismiss as insufficient can help reduce the risk.