I competed in my first tri a few weeks back, the bike and run went great but my swimming was terrible. I am excited to do many more but I need to get my swimming dialed in first. I am a very athletic guy and in the best shape of my life but as soon as I hit the water I can barely make it 50 meters without being completely out of breath. My swim partners claim that my technique is fine, so what gives? Any pointers breathing or otherwise would be greatly appreciated.