Hi welcome to health care magic.... Noted you had hepatomegaly in past... But you have not mentioned cause ....if known I can guide better suggestion... Anyway according to your history it seems you might had simple fatty liver or gall stone like condition.. Yes daily gym is good for healthy liver... Loose your weight if obese.... Take low fat diet if fatty liver.... Non veg , junk foods kept limited. For healthy liver functioning stay away from bad habit like smoking and alcohol. Some good food for liver taken like ...... -carrot -turmeric roots -onion -spinach -chicory -beets -blueberry and papaiya etc..... If still having hepatomegaly investigate with USG and liver enzymes study..... If still having fatty liver udiliv can be given... Take care.