Dear Peter,
I have am a 38 year old female, I’m 5’4” tall and I weigh 87kg. A friend of mine recently recommended that I try either the Tony Ferguson or Celebrity Slim weight loss programs to lose weight. Do these meal replacement programs really work?
Please help!
MaureenHi Maureen,
When you begin a new diet the first question you should ask yourself is “Can I stay on this diet for the rest of my life?”. If the answer is a resounding “No” then simply don’t bother starting because you are setting yourself up for failure before you even begin.
Slim-Fast, Opti-Fast & Tony Ferguson shakes are actually part of the problem not the solution. They are literally contributing to Australia’s obesity epidemic. Let me explain why this is the case.
See the body has something called the metabolic rate (or total energy expenditure) that is made up of the following components:
Metabolic Rate = (BMR) Basal Metabolic Rate + (TEA) Thermic Effect of Activity + (TEF) Thermic Effect of FoodBMR is the amount of calories burned by the body at rest to maintain itself this accounts for 50-80% of your total energy use.
TEA is the amount of calories burned during movement and physical activity; this component contributes 20-30% per cent of daily energy use.
TEF is the energy you use to eat, digest and metabolise food. It contributes about 5-10% of your energy use.
Now let’s say you have current a metabolic rate of 2000 calories daily. So if you continue to eat this from day to day you will maintain the same weight all other things being equal.
Now when starting a new diet the first thing people think of is that order to lose weight, they need to eat less, the minimal amount they eat the better.
So they drop their food intake from 2000 to 1250 calories daily by cutting out meals and/or replacing them with shakes and after a month they stand on the scale and squeal with delight their weight is down.
So what has happened? Well the body over the past month has noticed that is missing 750 calories it needs to function, so it has dipped into its energy reserves which consist of stored glucose (carbohydrate) in the form of glycogen and fat to help make up that calorie deficit. It’s important to note that stored with every gram of glycogen is 2-3ml of water so when the body breaks down the glycogen molecule to use for energy is also releases water weight … making you lighter.
So the diet continues, and soon glycogen stores are depleted. Now the body needs a new source in addition to the fat from which to draw on to meet its calorie requirements, the obvious choice being MUSCLE TISSUE.
See the body is now in survival mode it is being fed 1250 calories daily when it needs 2000 to function, so it needs to adapt to the new metabolic rate in order to survive and so over a number of weeks/months it does just that.
How did the body do this? In short it lost muscle. Why?
You see every organ in the body has metabolic activity and needs a certain amount of calories to survive. 1LB of fat needs 9 calories daily to maintain it, whereas 1LB of muscle needs 69 calories daily.
Remember the body is in survival mode. It would be highly inefficient to drop 1LB of stored fat for a net loss of 9cal daily when it could rid the body of a pound of muscle to save 7 times that in maintenance calories daily.
I think you can guess what comes next …
Weight loss stagnates, no longer can this person eat 1250 calories and lose weight as the bodies new metabolic rate is now 1250.
So after some time the person says screw it, this diet isn’t working anymore and quits. But since total muscle mass which is largely responsible for the BMR has been reduced over the past few months of dieting and a new metabolic rate established. When they go back to eating the way they were before they will be eating a surplus and the body is going to store it as fat leading to the person gaining all the weight they lost back … and then some.
This is yo-yo dieting and the results are catastrophic. This is what drives people to things like lap-banding, liposuction and leads to depression, self hatred and in the worst cases suicide.
So if the above strategy doesn’t work, what does?
Simple answer, focus on building more lean tissue (muscle mass) from the start. Muscle is the best fat burner. Think about one of your well muscled toned friends, chances are they can eat whatever they like and never seem to put on weight … this is because of the metabolic activity of lean tissue. The only way you will successfully get in shape is if you increase metabolism. The BMR is responsible for 50-80% of metabolic rate daily and total lean mass, especially muscle mass, is largely responsible for the BMR … so it would be best if you started there.
I hope that is has been enlightening Maureen and stay away from the shakes.
For more information go to
www.fitlab.com.au TRAIN HARD. BE STRONG.
Labels: Calories, Diet, Energy, Metabolism, Muscle, Supplement, Weight Loss