Yup. That’s what we’re talking about today.
I recently watched a CollegeHumor video making fun of the more common solution active women with a larger bustline seem to go for, the Two Sports Bras, found below:
When it comes to jiu jitsu, we’re pretty lucky because while it’s a full contact sport, it’s actually a fairly low impact sport on the joints, as opposed to say running, so we can get away with just one sports bra, unless there is running in your warm up and you are just that uncomfortable with that brief period of jogging.
While I agree that women’s sport bra…(er, developers? Designers?) still have a long way to go in terms of creating the perfect sports bra, finding the right sports one (or ones) really should be up there with any other sort of gear you wear to class: gi, compression shorts, etc. There have been studies and article out there which point out that a lot of women are wearing the wrong regular/everday bra, and I can only imagine it’s the same case for their activewear as well.
I also wanted to mention that there are sports bras for different levels of impact. Again, while jiu jitsu is a fairly low impact sport, I would suggest going with something medium to high support. Here’s are some tips from Champion USA on finding the right sports bra.
So, in short take some time and find the right gear for yourself. Your body will thank you for it.
A Skirt on the Mat 
This post reminds me of the time I tried a Tae Kwon Do school out.
In preparation for trying this school out, I went to a well known bra store and was professionally fitted for their best sports bra. The lady fitting me assured me that we were both the same, well endowed, size and she used that sports bra quite successfully for running. I tried it on in the dressing room, putting as much stress on it as I could in a tiny area, and found it acceptable.
I worked with a very lovely female black belt during my trial at the Tae Kwon Do school. She was very patient and helpful with me, considering that I was out of shape and an utter noob. At the end of the class, she took me aside and told me to invest in a sports bra, to keep the movement of my breasts down.
While I appreciate her spirit of helpfulness, overall, I couldn’t help but being frustrated and more than a little embarrassed. I’ve got boobs. They’re going to jiggle when doing something like TKD. Even the sports bras I wear now (different brand, about one size too small, for maximum boob imprisonment). Aside from duct taping them to my body, I’m not sure what more I can do.