We all know Obesity is our enemy, and the first thing we should do is to know our enemy. So, let's back to school and begin with knowing how our body works first. Or else, you are just shooting an arrow in the dark.

1, Think your body system as a car..

..the different is, the car is running on gas, but our bodies is running on blood sugar (glucose). If you ever did a blood test, there is a result showing you how much sugar concentrated in your blood, usually stated as mmol/liter.

When your running out of sugar, brain will detect it and send signal to your body system, and then hormone are released that instruct fat cells to metabolize fat and converted them to sugar form into our bloodstream.

And it also works in reverse way, which means if your bloodstream is overflowed by sugar, it will be converted to fat cells. This mechanism translates to our sugar fuel tank.. and the tank definitely has its size and normally its proportionate to our body weight.

2, Don't forget the Law of conservation of energy..

..states that energy can not be created or destroyed, it can only be changed from one form to another, e.g. friction turns kinetic energy into thermal energy.

The food you eat, will become a food energy that soon will be converted to different form of energy.

Any under utilized food energy will be converted to potential energy - which is stored as fat cells!

3, Metabolism cause you burn calories 24/7..

..even at your resting state, just as a car still burning gas even on idling state. Oopss, did I mentioned the car again?

Basically,even there is no physical activity, your body still using the energy for the functioning of the vital organs, such as the heart, lungs, brain and the rest of the nervous system, liver, kidneys, sex organs, muscles and skin. For men, caloric expenditure due to metabolism is averagely, say about 1500kcal.

A good handicap for us, I guess. So if you are thinking to lose weight, your strategy is to play with your metabolism and how to rev up you metabolism.