Metabolism – What’s the go with it? (Part 1)

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Your metabolism can be seen as your body’s engine where it constantly requires fuel (kilojoules) to keep it running. Factors that determine the amount of kilojoules that we burn include:

- Our resting metabolic rate (RMR). This is the amount of energy that is burned when we are at rest. i.e. the amount of energy that we use to breath and keep our heart beating.

- The energy we burn when we eat, digest and process food through our bodies.

- And not to mention, the amount of exercise / physical activity that we do during the day.

Did you know that the more muscles that you have, the higher your metabolism will be? This is one of the reasons why men can usually eat a little more and not gain as much weight. And as we enjoy more and more birthday cakes (i.e. get older) we will start to lose muscle mass and therefore our metabolism will start to decrease as well.

- Some medical conditions
- Amount of muscle mass
- Genetics
- Gender
- Age
- Some medications

- Some medications
- Genetics
- Diet
- Activity levels


One comment on “Metabolism – What’s the go with it? (Part 1)

  1. Most people think of dieting and weight loss in terms of calories in calories out. Create a calorie deficit, loose x amount of weight. Energy in energy out, the Laws of Thermodynamics, as if our bodies were simply a black box functioning on a specific energy source. Quite the contrary, hormones actually control all of our bodily functions, and when it comes to fat loss and dieting, insulin is the general. Notice I said fat loss, not weight loss, there’s a big difference. Think of insulin as your fat storage hormone. If we can control insulin by controlling blood sugar, we can increase the the amount of fat loss. When insulin levels are low, glucagon is elevated. Think of glucagon as insulin’s antagonistic hormone. Glucagon is responsible for lipolysis (break down of triglycerides into FFA’s) and finally beta-oxidation. As fats are burned the liver manufactures ketone bodies (byproducts of fat metabolism). These become the preferred fuel source for many cells including the brain. By providing an alternative energy source, we minimize the need for gluconeogenisis (conversion of amino acids to glucose). The two major circulating ketone bodies are acetoacetate and beta-hydroxybuterate. These provide a great deal of energy to cells which would have previously used glucose.

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