i would like to share of my experience that how to become a fit body
it's all about calories intake, and exercise. Don't eat too much rice and suger, especially after 2pm, coz rice have too much Carbohydrates.
here is a list that you can find out how much calories burned per hourly with different workouts. http://www.nutristrategy.com/activitylist4.htm
There are planty of websites that guide you how to lose your weight in healthy way. Nutrition is a key that really affects your health while you are trying to lose&gain your weight.
Keep eatting healthy food like eggs, salmon, vegetable, fruits...