What is Metabolism?

This word “metabolism” is thrown around a lot these days.

You know that if yours is too slow you might gain weight.  But what exactly does this all mean?

Well technically “metabolism” is the word to describe all of the biochemical reactions in your body.  It’s how you take in nutrients and oxygen and use them to fuel everything you do.

Your body has an incredible ability to grow, heal, and generally stay alive.  And without this amazing biochemistry you would not be possible.

 

Metabolism includes how the cells in your body:

  • Allow activities you can control (e.g. physical activity etc.).
  • Allow activities you can’t control (e.g. heart beat, wound healing, processing of nutrients & toxins, etc.).
  • Allow storage of excess energy for later.

So when you put all of these processes together into your metabolism you can imagine that these processes can work too quickly, too slowly, or just right.

Which brings us to the “metabolic rate”.

Metabolic rate

This is how fast your metabolism works and is measured in calories (yup, those calories!).

The calories you eat can go to one of three places:

  • Work (i.e. exercise and other activity).
  • Heat (i.e. from all those biochemical reactions).
  • Storage (i.e. extra leftover “unburned” calories stored as fat).

As you can imagine the more calories you burn as work or creating heat the easier it is to lose weight and keep it off because there will be fewer “leftover” calories to store for later.

 

There are a couple of different ways to measure metabolic rate.

 

One is the “resting metabolic rate” (RMR) which is how much energy your body uses when you’re not being physically active.

The other is the “total daily energy expenditure” (TDEE) which measures both the resting metabolic rate as well as the energy used for “work” (e.g. exercise) throughout a 24-hour period.

 

 

What affects your metabolic rate?

In a nutshell: a lot!

 

The first thing you may think of is your thyroid.

This gland at the front of your throat releases hormones to tell your body to “speed up” your metabolism.  Of course, the more thyroid hormone there is the faster things will work and the more calories you’ll burn.

(It’s very important to not only check your TSH numbers when you get your thyroid checked! That is more than I can get into here, but it is critical. A lot of the time there are things impacting thyroid function that will not be tested for. If you have any concerns, please reach out, I’mm happy to steer you in the right direction!)

But your thyroid’s not the only thing that affects your metabolic rate.

 

How big you are counts too!

Larger people have higher metabolic rates; but your body composition is crucial!

 

As you can imagine muscles that actively move and do work need more energy than fat does.  So the more lean muscle mass you have the more energy your body will burn and the higher your metabolic rate will be.  Even when you’re not working out.

This is exactly why weight training is often recommended as a part of a weight loss program.  Because you want muscles to be burning those calories for you.

 

The thing is, when people lose weight their metabolic rate often slows down which you don’t want to happen.  So you definitely want to offset that with more muscle mass.

Aerobic exercise also temporarily increases your metabolic rate.  Your muscles are burning fuel to move so they’re doing “work”.

 

The type of food you eat also affects your metabolic rate!

Your body actually burns calories to absorb, digest, and metabolize your food.  This is called the “thermic effect of food” (TEF).

You can use it to your advantage when you understand how your body metabolizes foods differently.

Fats, for example increase your TEF by 0-3%; carbs increase it by 5-10%, and protein increases it by 15-30%.  By trading some of your fat or carbs for lean protein you can slightly increase your metabolic rate.

 

Eating smart

Another bonus of protein is that your muscles need it to grow.  By working them out and feeding them what they need they will help you to lose weight and keep it off.

Another thing is, when you are choosing carbohydrates, choose those that are more fibre than sugar or starch is a smart way to control your blood sugar balance and metabolism hormones.

When choosing fats, choose more the omega fatty acids (Omega 3/6) or medium chain triglycerides (MCTs) for the best metabolic effect.

 

And don’t forget the mind-body connection.

There is plenty of research that shows the influence that things like stress and sleep have on the metabolic rate.

 

This is just the tip of the iceberg when it comes to metabolism and how so many different things can work to increase (or decrease) your metabolic rate.

 

Check out below –  lean protein recipe: Lemon Herb Roasted Chicken Breasts

Serves 4

 

1-2 lemons, sliced

1 tablespoon rosemary

1 tablespoon thyme

2 medium cloves garlic, thinly sliced

4 chicken breasts (boneless, skinless)

dash salt & pepper

1 tablespoon Avocado oil

1 tablespoon Omega oil blend (reserve)

 

Preheat oven to 450F.

Cooking hot, fast and uncovered produced a nice juicy bakes chicken, and not a tough steamed or dry roasted one.

Layer the lemon slices on the bottom of a baking dish.  Sprinkle with ½ of the herbs and ½ of the sliced garlic.

Place the chicken breasts on top and sprinkle salt & pepper.  Place remaining lemon, herbs and garlic on top of the chicken.  Drizzle with avocado oil.  Do not cover or tent with parchment paper.

Bake for 25 minutes or until chicken is cooked through. Make sure to check with instant read thermometer before removing chicken breast from the oven.

Cooking time varies depending on thickness of meat. It’s very easy.

  1. Thin under 2 inches thick: Bake for 25 minutes.
  2. Thick over 2 inches thick: Bake for 35 minutes.

Cook in both cases ensure it has reached a minimum internal temperature of 150 degrees F.

After baking it’s important to cover let chicken breast and allow it to rest. The chicken breast will reach internal temperature of 165 degrees F during this time. 

Drizzle wit omega oil. Serve & enjoy!

Tip: You can add a leftover sliced chicken breast to your salad for lunch the next day!

 

References:

http://www.precisionnutrition.com/all-about-energy-balance

https://authoritynutrition.com/10-ways-to-boost-metabolism/

About Dana Green Remedios

Holistic Nutritionist

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