Posts Tagged ‘Fat Burning’
Weight Loss: A Scientific Approach
Copyright (c) 2009 Stephen Smith
Losing weight is simple and easy to do. Virtually every diet and weight-loss program can help people shed the excess kilos in a short period of time. The problem is, losing weight and keeping it off long term is actually quite difficult.
The main reason why most diets or weight-loss programs don’t work is simply because they’re not sustainable. Starvation diets, low-carb diets, replacing food with shakes for main meals, the list goes on. None of these strategies offer long term, realistic and sustainable approaches to weight-loss.
Furthermore, the weight that is lost by using these approaches tends to be mainly water, stored carbohydrate and protein (lean body tissue) with some body fat. Our goal should be to maximise the amount of fat that is lost. In order to lose body fat instead of simply body weight, 3 criteria must be met:
1. A mild calorie (energy) deficit must be created.
2. The body must be encouraged to use stored fat as its primary fuel source.
3. Sufficient time must be allowed to pass in order to achieve substantial results.
Let’s look at each of these areas in detail:
1. A mild calorie (energy) deficit must be created. This means the body expends (burns up) more energy each day than is consumed, i.e. ‘energy out’ is greater than ‘energy in’. By creating a calorie (energy) deficit the body must then rely on existing fat stores in order to provide the additional calories it requires.
A mild calorie deficit can be achieved in two ways: eating less or boosting metabolism.
Eating less is the approach most diets use. Even though it is successful in the short term, the body soon adapts to it by slowing the metabolism and increasing appetite.
Boosting metabolism is a far more effective approach to losing weight and burning fat and it can be done through a variety of mechanisms. Increasing meal frequency (eating 5 meals a day instead of 3), eating foods that boost metabolism like chilli and curries, exercising and using supplements that boost metabolism like ‘thermogenics’ all assist fat burning in the body.
2. The body must be encouraged to use stored fat as its primary fuel source. This may be achieved by ensuring the level of insulin in the body is kept as low as possible. Insulin is a storage hormone, which means it increases the uptake of nutrients into cells. Whilst this may be beneficial from an anabolic (muscle building) perspective, insulin also promotes the storage of excess glucose as body fat. Worse still, it stops the mobilisation and utilisation of fat for fuel (fat burning).
There are many way to keep insulin low in the body. Eating small meals, controlling carbohydrate intake and using supplements like, glucose disposal agents (GDAs) all keep insulin low.
Eating large meals promotes greater insulin secretion by the pancreas. Therefore, small meals will keep this down.
Being aware of carbohydrate sources is also important because it is the macronutrient (carbohydrate, protein and fat) that has the greatest impact on insulin secretion. It is not necessary to follow a low carb diet in order to keep insulin low but by simply eating more low density carbs (broccoli, cauliflower, beans, peas, etc) and less high density carbs (bread, pasta, rice, cereals, etc) insulin will stay low.
GDAs assist the body in disposing glucose more effectively by increasing its uptake into the lean tissues of the body (muscles, organs, etc.).
3. Sufficient time must be allowed to pass in order to achieve substantial results. Since it takes time for the body to burn off body fat it is essential to allow sufficient time to pass rather than expecting dramatic results overnight!
If we estimate that a 300-calorie deficit won’t have a major negative impact on our metabolism and if we assume that all of those calories that the body needs are derived from fat stores (which doesn’t occur but for the sake of the argument we will assume that it does), then the body can only lose about 33 grams of fat a day! [1 gram of fat has 9 calories] That works out to be 231 grams of fat a week! This is a far cry from the several kilos of weight that may be lost in a week!
As a result of this, people must be realistic in their expectations. A good example of this is competitive bodybuilders who generally allow themselves 12-14 weeks to get ready for a show. These athletes are usually already lean by population standards but the 12-14-week period allows them to achieve extremely low levels of body fat without sacrificing their precious muscle tissue.
If you are serious about losing body fat, not just body weight, then allow yourself at least 12-14 weeks to achieve your physical goals.
Overall, these strategies are used by all successful weight-loss systems. They provide people with proven techniques and products that can help them lose weight and keep it off without having an impact on their lifestyle. Let’s face it, there’s nothing better than losing weight (which is mainly fat), getting in great shape and still being able to enjoy life!
Losing Weight – Easier Said Than Done
You finally decide to lose those excess pounds of body fat. You open your favorite search engine and start looking for the “best weight loss program” or some “magic” pill that will make things much easier for you. You find tons of ads that offer you fast and effortless weight loss in few weeks or even days, and you think, “Wow, that’s exactly what I am looking for.”
Unfortunately, the chances of finding something that really works are minimal. Why? Because 99% of the weight loss systems or drugs you will find are either potentially dangerous for your health or pure marketing hype. Everybody likes to hear that losing weight is fast and easy, and nobody wants to hear it is a gradual process that requires some effort and discipline. So the self-claimed weight loss “experts” are giving to you exactly what you are looking for – a fast and easy solution for your problem. Unfortunately the easy way is not the way that will lead you to healthy and long-term results. If you want to learn how to detect the hype and the gimmicks you have to understand the basics of weight loss first. So let’s start! Weight loss vs. fat loss
First of all, let’s consider the differences between both things: There are many ways to lose weight -losing water weight, losing muscle and bone weight, and losing body fat. In fact, it is very easy to lose “weight.” Just start exercising and reduce your water intake and you will lose several pounds in the first few days. When exercising, your body loses a lot of water and because you have stopped drinking liquids, you easily become dehydrated and you will weigh several pounds less. But is this is a long-term and healthy weight loss? Of course not. You will gain back the weight as soon as you restore your normal water intake.
Here is another example: When you go on a diet and cut your calorie intake too much, your body detects the severe calorie deficit and slows down your metabolism. As a result, you stop losing fat (your reserve fuel), and start getting the energy you need from the muscle tissue. The result is decreased body weight, but unfortunately you have lost muscle instead of losing body fat.
As you see, to achieve long-term, natural weight loss you need to burn as much fat as possible with the minimum lean body mass loss. How exactly fat is burned?
If you are a healthy person, to successfully lose fat you only need to burn more calories than you eat (or drink) while maintaining your metabolism fast. Isn’t it simple? In order to achieve this, your calories must come from the proper food sources, such as lean protein (chicken breast, egg whites, seafood, extra-lean red meat), complex carbs (oatmeal, brown rice, whole grains, vegetables, etc.) and “good” fats (olive oil, flaxseeds, fatty fish and cod liver oil). You should also add some kind of cardio exercise to your program, such as walking, jogging or cycling. Keep in mind that cardio is considered the best way to directly burn the fat.
Let’s look at an example:
If you burn 2500 kCal and eat about 2000 kCal every day, that is a deficit of 500 kCal. There are 3500 kCal in 1 pound of fat. This means you will be burning 1 pound per week of pure body fat. Surprised? Yes, only 1 pound per week. I know “10 pounds in two days!” sounds much better, but that is far from realistic goal.
Keep in mind that if you cut your calorie intake too much, you will slow down your metabolism, and this is not desirable if your goal is fat loss. This means that “Eat 500 kCal – Burn 2500 kCal – Lose 4 pounds per week” won’t work for you.
It’s definitely possible to burn fat at faster rates (with proper nutrition and exercise program), even without supplements, but keep in mind that the maximum rate that is considered healthy is 2 pounds per week (if you are extremely overweight, up to 3 pounds per week is fine). Achieving healthy long-term weight loss faster is practically impossible. If you find products or nutrition plans that promise fast weight loss, they probably base their claims on dehydration. You can lose water weight really fast but this is not a real fat loss and can lead to serious health conditions.Summary
You don’t need a pill to lose weight. You don’t need to starve yourself, to restrict the intake of any macronutrient, or to buy any “miracle” product. You just need to consume fewer calories than you burn, and those should come from good natural food sources. The best way to increase the amount of calories you burn and to create such calorie deficit is to exercise. Mild calorie restriction plus 30 to 40 minutes of intensive cardio exercise every day is the “magic formula” you are looking for and that will make you lose fat like never before.