Fatigue is well recognized as a side-effect of cancer and its treatment. Medical consultants advised people with cancer to rest if they felt fatigued. More recently a number of studies suggested physical exercise as a helpful tool in reducing the fatigue that is associated with cancer. Cramp F et al reviewed the effect of physical exercise on fatigue related to cancer. Twenty-eight studies were included in their review. Result of this review suggested that physical exercise can help to reduce fatigue both during and after treatment for cancer. However it is non clear what is the best type or intensity of exercise for reducing the symptom of fatigue.