Any virus infection, more so with Hepatitis viruses tend cause a period of morbidity depending on the severity of infection and the period taken to recover. One of the more important symptoms of hepatitis is weight loss, as lack of appetite is a constant feature of the infection. So much so there is associated weight loss. During the recovery phase I suggest that you should take things steadily and introduce physical exercise gradually with a well balanced diet and get to your normal phase in the course of next few months.