[irtrogdor]

I have had the same thing happen to me before. For me is feels like I some how went to the gym and worked out my chest cavity. My best guess is that when you take a huge breath of air then go to depth the ligaments and little bits that hold your lungs in place get stretched out and sore. So then the next day you feel like you worked those muscles out at the gym. I actually had to take advil once to help me fall asleep after a long day of diving.

oh yeah, I only dive to around 12 meters for hunting, so it probably doesn't have much to do with depth...