You should really start wearing a training bra when you start to develop in the brest area.

If you have started to grow breast then yes you should wear a bra. If you don't like the feel of the under wire you could always try one with out it. Also there are bra's with no padding. And then the simple sports bra could be used if thats what you'd be more comfortable … Read more

As long as you're a 32A there should be no need to wear a training bra because your breast are already starting to develop. (: Hope it was help!!