Obesity, the condition of being grossly overweight, has hit people of all ages, across the globe. Many factors contribute to obesity, one of the chief reasons being junk food and lack of exercise. Obese people, out of laziness or the mere reason of being overweight, often skip regular exercises, even the simple ones. Worst is the case of those people who live on earth just to stuff themselves with food. With self-determination and some efforts, you can help yourself a great deal in preventing the condition of being obese. Simple activities, such as climbing the stairs instead of using lifts, morning and evening walk in the park and swimming, can bring about big changes in your lifestyle. Such activities will not only help you burn excess fat, but also help you stay active.