It seems that almost everyone you speak to these days is on a diet or would like to lose body fat. One word that often pops up in conversation is metabolism or more specifically, ways to speed up metabolism. It is usually in the context of, ‘I’ve put on so much weight so I must have a slow metabolism’.

Metabolism is the total of all the chemical reactions that take place within all the cells of the body. These chemical reactions use up energy and of course, the more energy you use up the more fat you will burn. Metabolism is a very individual thing. I’m sure you know some people who can literally eat whatever they want and still lose weight, whilst others only need to look at food and they put weight on.

Why is this? Well, there are 3 major factors that influence our metabolism and we will examine each one to find out how you can speed up metabolism using lifestyle factors.

Muscle mass

The first factor is your muscle mass. Since muscle is the most metabolically active tissue in the body (along with nerve tissue), which means it burns up the most energy, the more muscle you have, the easier it is to speed up metabolism and the faster you can burn off body fat.

Now I know you’re probably thinking, ‘But I don’t want to put on muscle!’ Before you disregard this idea, consider this: If you want to lose weight and you don’t force your body to at least maintain your existing muscle mass (through weight training), up to half of the weight you lose may come from muscle tissue.

If this occurs, your metabolism will slow down dramatically making it harder to continue to lose weight and easier to put the weight you lost back on. This is often the case when people go off a diet, they put the lost weight back on and it usually comes back with re-inforcements! It is called yo-yo dieting, referring to the up and down movements of the dieter’s bodyweight.

All you need to do to prevent the muscle loss that results from dieting and/ or performing aerobic exercise is to simply perform a minimum of two 30-minute weight training sessions a week. A qualified personal trainer can show you exactly what to do to ensure you weight train safely and effectively.

Furthermore, if you put on just a few kilos of body-shaping muscle it will have a huge impact on your metabolism. For every kilogram of muscle you put on, your metabolism increases by around 100 calories per day and over a few weeks this can help burn up a substantial amount of body fat.

So even though your body weight may not change substantially, your body composition will because you have increased your muscle mass and lost body fat.

Also, as we age we tend to lose muscle. This results because our body’s functioning capacity reduces but also because we become less active. Just as the saying goes: ‘use it or lose it’.

In fact, research shows us that from the age of 30 to 65 most people have halved their muscle mass and doubled their fat mass and this is often called the ‘middle-age spread’. The ‘middle-age spread’ can easily be prevented or reduced by simply maintaining your muscle mass and therefore your metabolism through weight training.

Thyroid function

The gland that directly affects the metabolism of all body cells is the thyroid gland, which is situated around the trachea in the throat. The thyroid gland produces the thyroid hormones, thyroxine (T4) and tri-iodothyronine (T3) and these hormones directly speed up metabolism of all body cells. T3 is actually five times more powerful than T4.

The thyroid gland’s functioning is affected by many factors; primarily, meal frequency and nutrient intake.

Nutrition experts recommend we have 5-6 small meals each day spread out every 2-3 hours. By doing so, we tell our body that we have a continual supply of nutrients. If we go without a meal for around 4 hours or more the body’s Anti-Starvation Response kicks in and the first thing that occurs is the body reduces it’s output of thyroid hormones.

The Anti-Starvation Response is an evolutionary response to a low blood glucose (sugar) level. It helped our ancestors survive famines thousands of years ago. Unfortunately the same thing occurs in our body as well. Whenever our blood glucose drops too low, our output of thyroid hormones decreases, which slows down the metabolism of all body cells, therefore preserving energy and helping us survive the ‘famine’.

Also, certain nutrients influence the functioning of the thyroid gland. Kelp (a type of seaweed that is a good source of iodine) and the mineral selenium have been shown to have a direct impact on the functioning of the thyroid gland. When these nutrients are supplemented in the diet they increase the output of thyroid hormones, even in people with normal functioning thyroid glands. Of course, increases in the output of these hormones speed up metabolism of all body cells.

Sympathetic tone

Sympathetic tone is the term used to describe the amount of norepinephrine (NE) released from the ends of neurons. Norepinephrine is a neurotransmitter (nerve transmitter) and the more NE is released, the higher the sympathetic tone or metabolic activity of many organs within the body. This speeds up metabolism.

The people who can eat everything and not put on weight generally have a naturally high sympathetic tone and those people who put on weight just by looking at food tend to have a low sympathetic tone.

The easiest way to increase your sympathetic tone is by using ‘thermogenics’. Thermogenesis, as the name suggests, means the production of heat within the body [‘thermo’: heat, ‘genesis’: the beginning]. Heat is a by-product of energy production, therefore if you burn up more fuel, you generate more heat.

Some examples of thermogenics include certain foods like, coffee or cocoa (caffeine and theobromine- in cocoa) and chilli (capsaicin), certain herbs (forskolin, evodiamine and ephedra) and certain fruit extracts (citrus aurantium). Green tea also has a very mild thermogenic effect but is mainly used as a ‘thermogenic extender’, which means it helps the thermogenics last longer in the body.

Thermogenics powerfully speed up metabolism so it is worthwhile ‘cycling’ their use, which means use them for a period of time, say eight weeks, and then stop them for 2-4 weeks. You may also want to use them for two days on and one day off during the 8-week cycle.

A good example of a thermogenic is XLR8 Thermogenic.

So there you have it! Now you’ve go no more excuses for having a slow metabolism and you have some powerful strategies to speed up metabolism and easily shed those unwanted kilos.

A summary of the strategies is as follows:

o Weight train twice a week (minimum).

o Have 5-6 small meals each day.

o Supplement your diet with kelp and selenium*.

o Use thermogenics occasionally*.

So go to it and start turning your body into that fat-burning machine!

• Before using any nutritional supplement, speak with your health care professional.