More physical activity = more grey matter

Senses,muscle movements,emotions,memory, speech....just a few functions the grey matter in our brains is responsible for controlling. The more grey matter in our brains the better our cognitive function .....so important as we get older.
Several studies have been performed which clearly show that activities even just house cleaning, walking the dog,gardening result in larger grey matter. 
And if you add exercise to this the results improve substantially - this doesn't have to be vigorous it can be a longer walk, hiking, swimming, yoga whatever takes your fancy. 
The key is to stay moving ​