https://community.usms.org/swimming/f/open-water-training-and-technique/24524/stomach-acidity-problemHi everybody Last month I finished my first open water swim of 15 km distance in 4hrs. and 30mins I have been swimming for 3 years with many breaks except last year with no breaks and with 3-4 training sessions a week 3 to 5 km per session, the monthen-USTelligent Community 12