You are absolutely right in saying that because HAART, the anti-HIV
regimens have a host of side effects on lipid metabolism- handling the fats in the body, cause abnormal fat deposition and cause dyslipidemias.
You are doing exercises that is a good step but quality and regularity matters.
I would suggest to have a jogging of 3-5 km in the mornings daily and a gym work out for about half an hour thrice a week in the evenings, to mobilise the fat and smoothen it's distribution and to burn it for body's energy requirements.
Try to cut down fat intake in the diet particularly saturated fats and the fat in fried foods.
Wish you a great health.