There is so much talk these days about how to lose fat weight.  We get bombarded on a daily basis with advertisements, magazine and newspaper articles, product marketing, and more telling us all the various ways about how to lose fat weight.  Despite what many of the ads, products, and articles may say, there is only one tried and true method that will help us to lose fat weight.  It is through diet and exercise.  And while the diet plays a major role in fat loss, exercise is a key factor in helping you to reach your weight loss goal.

There a two ways to exercise that will help you to get the results you want.  If you are looking to drop some pounds, applying these methods is how to lose the fat weight you want to lose.
 
One method involves time. If you have the time to spend multiple hours exercising through the day, the result of the calories burned over the course of that time will help you to lose fat weight. This assumes that the contribution of the calories burned helps create a overall caloric deficit. This occurs when the total calories consumed in a day are less than those that were burned and used as energy by your body.
 
Exercising in this manner doesn't require a high level of intensity.  Keeping your heart rate at 55% to 65% of its maximum qualifies as low intensity.  Maintaining a low intensity effort yet performing the exercise for an extended period of time will use primarily fat stores as an energy source.  Your goal should be to burn 300 to 500 calories per workout depending on your diet.  Accomplishing that total caloric burn using this method would take approximately 3 to 4 hours, and possibly a little more depending on how much you limit your intensity level.
 
The second, and sometimes more preferred method of exercising to lose fat weight is to increase the level of intensity of the workout.  Doing so abbreviates the amount of time that is necessary to workout in order to achieve the desired goal caloric burn.  A high intensity workout would typically be one where the heart rate is approximately 70% to 80% or more of  maximum during the exercise.  A workout at this effort would cut the necessary exercise time essentially in half.  The energy sources used in this type of workout are carbohydrate and fat stores. 
 
One thing to remember is that no matter which energy source is used as fuel for the body to workout, it still takes burning 3500 calories to lose one pound of fat.  So regardless of the energy source used, it still requires that specific amount of caloric deficit to lose one pound of fat weight. 
 
Following a good diet and applying these two principles of exercise is the real answer to how to lose fat weight.