I am 198 lbs. every time i exercise, i end up straining something in my body. i also lose weight only in my legs, arms, and face. how can i loose belly fat?

Nutrition: The problem with 'belly fat' is that it's so easy to gain it and so hard to lose it. Try to focus on nutrition first, and avoid carbs like bread, rice, potato, pasta, and desserts. For exercise, try to work on getting cardio fitness rather than weight training. As you burn more calories and eat healthier, the mid-section body fat will slim down.

Cardio Mix: If you have adipose tissue to lose (not everyone does), then consider an increase in cardio and a balanced diet. However, do not always do the same exercise or you will increase your risks for stress injuries. Mix things up with walking, running, biking, swimming, or circuit training. Ultimately you need to burn more than you consume.

Stay focused: Everyone should diet/exercise. If your body stores fat at the abdomen predominantly that will be the last area to go. That is where liposuction, tummy tuck, and some new non-invasive procedures: coolsculpting, liposonix, can come in handy. Ask your primary care doctor for diet and exercise advice. Consider a personal trainer or exercise classes for group support.