Exercise and nutrition
Exercise improves appetite and increases your need for calories, so having a healthy balanced diet is crucial. A person can be extremely advanced in their workout but not receive the full benefits because of the fuel they are using. The general advice on what kinds of food to eat and in what proportions is exactly the same for people living with HIV as they are for anyone else.
If you are looking to reduce fat then lowering your daily calorie intake and increasing your activity levels will help get rid of those extra inches. Try especially to reduce fats, sugars and processed foods (which often contain quite a lot of both).
On the other hand, if you are looking to increase weight and build muscle, then you need to ensure you're taking in enough calories to fuel your muscle growth.
If you want specific recommendations on healthy eating, ask at your clinic to speak to a dietician.
Given the increase in body temperature during exercise, you will need to drink more to hydrate your body, which means drinking more fluid than your recommended 1.2 litres (6-8 glasses) a day.