How to lose 10lbs in 10 days

[Disclaimer: It is sad I need one, but obviously people can’t read. This post is a mathematical example of how practicallyΒ  impossible and unsafe it is to lose 10lbs of pure fat in 10 days. Read what I wrote before you leave your comments.]

I wanted to give you some food for thought the next time you pass by a news stand and it makes the claim “lose 10lbs in 10 days!”

An estimated 60 to 85% of white adipose tissue’s weight is lipid, with 90-99% being triglyceride. The remaining weight is water and a slight amount of protein. The weight of 1lbs of stored lipid is roughly 400 grams. If we know through other calculations that fat energy is 9/kcal per gram then it’s time to do a little math.

9×400 = 3,600 Calories (general round figure is 3500 calories per pound of fat)

No matter what you believe from carbphobia to fat hate, you can’t dispute the amount of energy in stored fat. To remove that energy, you have to be in a deficit of that caloric amount (actually more) in order to remove a pound of fat. Since there is no way in ensure 100% energy consumption in fat, this would take more energy expenditure than 3,500.

In order to remove 10lbs of pure fat in 10 days, it would take an excess of 35,000 calories. To give you some perspective on the severity of that, here are a few more numbers.

Sex – Female
Weight – 155lbs
Height – 5’5
Activity Level (including general training) – 1.5
BMR + Activity – 2,300 calories burn per day, with general exercise

As you can see in this example this female doesn’t even burn 3,500 calories per day. Even if with exercise she increased her burn to 3,500 calories, she would have to not eat in order to get close to burning a pound of fat in one day. That would mean she would have to burn over 3,500 calories a day, while not eating, for 10 days. Even then, there are flaws because of metabolic adaptations and energy pathway changes.

Next time you see gimmicks and headlines on web pages or magazine stands, do a little math and have a laugh. If lost in the shuffle – this may help.

Before starting any new diet and exercise program please check with your doctor and clear any exercise and/or diet changes with them before beginning. I am not a doctor or registered dietitian. I do not claim to cure any cause, condition or disease. I do not provide medical aid or nutrition for the purpose of health or disease and claim to be a doctor or dietitian. This is merely an opinion blog. Read full disclaimer here -