When I was doing butterflies last night my right shoulder keeps popping out of place...sometimes it even lock up. I'm double jointed in this arm to the point that I can completly remove my arm from socket...is there a brace that I can where in this area to help prevent that? I mean I'm sore every where...but that shoulder is the worse!!
L RRAINE

The easiest way to solve the problem is this:

When you are doing the exercise ... are your arms bent. The motion should be like you are "hugging a tree". That's with dumbbells of course. Are you using dumbbells or a machine?

In either case, do the exercise and lower them until you feel the pop. On all subsequent reps, lower the weight to a point JUST BEFORE you know it will pop.

This is called reducing your range of motion ... You will get the benefits of the exercise to the best that your body will allow. Eventually, the shoulder socket and the connecting tissues in there will strengthen up, and you will be able to extend lower.

If that doesn't work, then abandon the exercise or use lighter weight. There are many options for training chest.

I'm using a machine! I do what you suggested!
Thanks,
Lorraine