You know you have pecs right?

There's a lot of muscle underneath that you don't normally use. Perhaps the inflammation is causing some irritation in your breasts as well?

If you are not wearing the right bra this can happened. Happened to me once, when I wore my regular lacy bra to work out and not my sports bra. My skin and nipples got chafed and it hurt.

About a day after doing an extensive arm and chest workout at the gym, my breast are very sore and tender. None of the weights are hitting my chest directly. A few days later, it seems to go away. Anyone else experience this, or perhaps it's not relsted to exercise at all?