I have this big problem of water retaining in my belly . although i do lot of cardio, strength training but i can't get rid of it.please help..?

How do you know? : Is your belly swollen? Or could it be fat accumulation. If it really water that is accumulating it may be a problem of liver disease or heart problem. Please get it checked.

Nutrition: First and foremost i would check with your primary care doctor to make sure you don't have a problem with one of your organs. Aside from that i would take a hard look at your diet to make sure you don't have a mild type of food allergy.