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Re:Dancing can reverse the signs of aging in the brain by pmoriarty on Saturday August 26, 2017 @12:13PM (#15106052)
It wasn't just any kind of dancing:

"We tried to provide our seniors in the dance group with constantly changing dance routines of different genres (Jazz, Square, Latin-American and Line Dance). Steps, arm-patterns, formations, speed and rhythms were changed every second week to keep them in a constant learning process. The most challenging aspect for them was to recall the routines under the pressure of time and without any cues from the instructor."

Re:Dancing can reverse the signs of aging in the brain by crowbahr on Saturday August 26, 2017 @04:17PM (#15107196)
I think that part was probably more important than exercise or social interaction. Not that they don't have their places, just that it's likely more the intellectual challenge that gets them going.