Looking at this: "Dancing compared to conventional fitness activity led to larger volume increases in more brain areas, including the cingulate cortex, insula, corpus callosum and sensorimotor cortex. Only dancing was associated with an increase in plasma BDNF levels. Regarding cognition, both groups improved in attention and spatial memory, but no significant group differences emerged. The latter finding may indicat…
For me the key question is: what is the key ingredient (or the right mix of ingredients)? E.g. is it having a programme to follow (having aims/duties is known to increase longevity, see the famous 'plant study')? Or rhythmic fluid movements (so like tai chi or qi gong or yoga)? Or the combination with music (multimodal stimulation)? Or the social component of dancing (so e.g. encouraging proximity like mutual hair brushing, engagement that encourages touch, etc)?
Fascinating and raises many new questions. But it's clear the most deadly thing is probably inactivity.