So I finally got 4 dives in after being certified, the diving went fantastically, my gear that I got for Christmas worked beautifully, buoyancy was a cinch, and my breathing/air consumption was better than when I got certified. However, today, I did some freediving and I was able to stay under water for well over a minute while swimming (which is really good for me, not for most free divers I'm sure) and hit about 1:40 on my longest dive without too much of a problem. Before I did any SCUBA diving my average was about 50s. Does SCUBA have any effect on lung capacity/breathing out of water? It was a bit bizarre