Ask the doctor: I fractured my hip three years ago, but my leg still hurts when I exercise. Should I stop exercising?

I?m a 78-year-old athlete and dancer. Three years ago, I broke my hip. After it was repaired I completed extensive physical therapy. Since then, I?ve been working out at a gym using the treadmill, stationary bicycle, and rowing machine. But I still have tremendous pain in my thigh. Should I stop exercising? It helps me control my weight and blood pressure.