Do teenagers have armpit glands that are more active than older people?
If you walk in to a room full of kids that are hot and sweaty, the bad aroma can be overwhelming. It seems like this is more of a problem for young kids. I don't think I sweat nearly as much as I used to.
For many years now I have just used a deodorant instead of an antiperspirant. I no longer seem to have a problem with sweating under my arms and use the deodorant so they smell better.