Why is my stomach bloated all the time? I do sports drink water although I gained 1-2 kgs. Iam 163 CM and 64 kg.

Abdominal bloating. There are lots of reasons (some quite concerning) for abdominal discomfort /bloating, but not all of them are due to the GI tract. Also, functional syndromes may be present without underlying inflammation or structural pathology. Check with your doctor for examination ; treatment options, particularly since your problem seems to be ongoing. Not pregnant, right?