I had a conversation with a friend and he came up with an interesting story. A Doctor once told him, that he must talk more when he is retired and old because there is currently no way to prevent memory loss. Talking more, maybe the only way.

There are at least three advantages if the elderly people communicate more.

First: Speaking will activate the brain & keep the brain agile, because language & thinking communicate with each other, especially speaking quickly, which naturally exercises the rapid reflection of thinking & also enhances Memory.  An elderly person who is not talkative is more susceptible to memory loss.

Second: Speaking can release a lot of psychological stress, expel mental illness & reduce mental stress. We often say nothing, but bury it in our hearts & suffocate ourselves.

Third: Speaking can exercise the active Facial muscles & at the same time, exercise the throat & even increase the lung capacity, & at the same time, it can reduce the decline of sight & ears & reduce latent dangers, such as dizziness & deafness. 

To summarize, when a person reaches a certain age talking as much as possible & actively interacting with people, are the only ways to prevent memory loss, depression, and loss of agility as there is no cure or full treatment, as yet.

To communicate more and look for opportunities to exchange ideas with others. Join a club for speaking like toastmasters or gang up with like-minded people in a walking club.