pos....what happens the coin age of the change after i send a amount

[John_Sena007]

Ok simple scenario I have 100 'whatever' coins in a PoS wallet, they are mature and have a stake weight that is approaching the weight to stake and forge a block.
I send 1 whatever coin to my friend and get 99 back to the change address, is my stake weight consumed or maintained?

I realize using a fictional coin isn't ideal, if its treated differently in different existing coins that would be useful to know.