Exercise may protect your brain even if you have signs of dementia, study  findsExercise is good for you. Breaking a sweat has been shown to improve nearly every organ in the body, fight nearly every disease doctors diagnose and improve nearly every health condition that you might live with on a daily basis.

It gets even better. A new study finds exercise boosts levels of a protein known to strengthen communication between brain cells via synapses, which may be a key factor in keeping dementia at bay.

The protective effect was even found in active older people whose brains showed signs of plaques, tangles and other hallmarks of Alzheimer’s and other cognitive diseases.
“Synapses are the critical communicating junctions between nerve cells and are really where the magic happens when it comes to cognition,” said study author Kaitlin Casaletto, an assistant professor of neurology in the Memory and Aging Center at the University of California San Francisco, in an email.