Lose Fat Effectively (Part 2): You Are What You Eat
Watch what you eat. This is the next 20% of the battle against fat.
1 pound of Fat is equal to 3,500 calories. In theory, to lose a pound of fat, you have to burn 3,500 calories.
So how can you burn calories? There are two ways to do it: through your metabolism and cardiovascular exercise.
Let's first discuss metabolism. Metabolism is a series of chemical reactions in our cells to convert the fuel in the food we eat so we can have energy for everything we do. You are burning calories while you work, play, sleep, think, even when you're just watch TV. In short, you burn calories just to exist.
So how many calories do you actually burn? well it depends on your daily activities and how big you are. The bigger you are, the more calories are needed to keep you alive. I have provided you a way to know how much your body burns everyday, which is known as your total daily energy expenditure (TDEE). This is called the Harris-Benedict formula. First you have to calculate for your Basal Metabolic Rate (also known as BMR, which is the amount of calories you burn just to exist, minus all the activities). To calculate for your BMR:
To determine the BMR for men:
BMR = 655 + (6.2 x weight pounds) + (12.7 x height in inches) - (6.8 x age in years)
To determine the BMR for women:
BMR = 655 + (4.4 x weight pounds) + (4.6 x height in inches) - (4.7 x age in years)
Example:
Man
180 lbs
74 inches (6'2")
28 years old
BMR = 655 + (6.2 x weight pounds) + (12.7 x height in inches) - (6.8 x age in years)
BMR = 655 + 1116 + 938.8 - 190.4
BMR = 2520 calories
To compute for TDEE, mulitply your BMR by your activity factor:
Activity factor
Sedentary = BMR X 1.2 (little or no exercise, desk job)
Lightly active = BMR X 1.375 (light exercise/sports 1-3 days/wk)
Mod. active = BMR X 1.55 (moderate exercise/sports 3-5 days/wk)
Very active = BMR X 1.725 (hard exercise/sports 6-7 days/wk)
Extr. Active = BMR X 1.9 (hard daily exercise/sports & physical job or 2 X day training, marathon, etc)
The man above, if he's very active, is burning 4347 calories a day.
Now, if your TDEE is 2500cal/day, and you eat only 2000cal/day, you are making a deficit of 500cal/day. In one week, you make a deficit of 3,500. You lose 1 pound of fat per week without working out. If you eat 1500cal/day, you lose 2lbs of fat per week.
Simple isn’t it? Yeah... but in reality, it is not. Because even if you lose 2lbs of fat each week each week for the four or six weeks, it won't be the same for the succeeding weeks, until the time when you're not losing fat anymore.
Here's the explanation:
Have you ever wondered why our ancestors were able to withstood famine? Because the body is an intelligent creation. It can detect your caloric intake for a period of time. If you are reducing your caloric intake for a month or two, your body will think "hey, I’m not eating as much as I used to, there must be a famine... I better conserve energy to keep this person alive." Your body will now lower your BMR and TDEE by slowing your metabolism. Your body cannot differentiate famine from your fat-loss efforts.
The way around this is to trick your body, by eating high-calorie diets every 4 days. Before your body starts to burn less calories, jump start your metabolism by eating whatever you want every 4th day.
If your TDEE is about 2500cal/day, your calorie consumption routine may look like:
Monday - 1500cal
Tuesday - 1500cal
Wednesday - 1500cal
Thursday - 2500cal
Friday - 1500cal
Saturday - 1500cal
Sunday - 1500cal
Monday - 2500cal
In one week, you lose a little less than 2lbs of fat, in a month, you'll lose about 8lbs of fat!
For me, the ideal rate of fatloss is 2lbs per week. Any more than that, it's very likely that you're losing muscle along with fat. Muscle tissues are important because they are metabolically active.The more muscle tissues you have, the higher your metabolic rate. The higher your metabolism, the more calories you burn even while at rest.
Other parts of this series:
Part 1 - Your Reason