I can imagine that lifting weights tighten your stomach and push some gas out of it, or even from small intestine. If it was only the air, you'd get rid of it fast. If you think, it is a large amount of, and you need several minutes to expell it, than it should be from bacteria. Well, sometimes bacteria may overgrow in the small intestine. It is a BREATH TEST for small intestinal bacterial overgrowth (SIBO) wich can show this.
This condition (belching) is also worsened drasticaly by lifting weights. Could possibly I just have developed some sort of intolerance for getting rid of gas?
Honestly, I can't imagine any other cause of chronic belching, as H. pylori. I believe breath urea test is a reliable test for this.
On the other hand, you eat a lot of fibers. When bacteria break down fibers, they produce gas, but this would go with flatulence, not with belching.
My diet ever since starting the 2x daily protonix has been strictly oats, eggs, whole wheat foods, nuts, milk, chicken (all meats actualy), and vegetables & fruits. I cut out all soda and caffinated drinks 1+ year ago.
Strange thing is throughout the night I sometimes wakeup and belch.
Well, strange - no H. pylori. What's your diet and what do you drink?