Yes I have arthritis in both hips, lower back and hands. My right hip needs the replacement .... I am well aware of my eating habits I follow a healthy diet with no added fats, sugar or salt! I shed 1-2 stone then it sticks and 6/7 months it has still stuck it just won't budge without exercise.....
Did they specifically tell you that you needed a hip replacement? What exactly is the matter with your hip?
You won't be able to lose weight just by exercising. You'll have to go on a diet. Eat more fruit and vegetables, drink more water, that kind of thing.