25 minutes of moderate exercise weekly can help prevent cognitive decline. Alzheimer's is common, which can account for between six and seven out of every ten cases.

More than 900,000 people suffer from dementia in Spain, being the most common cause. The risk of suffering from dementia can be prevented by improving lifestyle habits, says Jesús Porta Etessam, president of the Spanish Society of Neurology. Could physical exercise be a kind of preventive medicine against Alzheimer's? “The fact that we are doing physical exercise over time can increase brain volume and, therefore, theoretically reduce the risk of future cognitive decline,” says Porta.