NASM Chapter 3 Continued.

Imagine you are in a nice lovely field. The sun is gentle as it warms you while you are laying in that pasture. You don’t have a care in the world. Nothing to bother you.

You are zen in that moment.

Now use your imagination and picture yourself inching closer and closer to the door of an airplane. The only problem is THE AIRPLANE IS ON FIRE. You have to jump out. You have a parachute. BUT YOU HAVE TO JUMP OUT!

Very different scenarios there?

That was to illustrate an incredible point. Where you thinking of how fast your heart and respiration rates were in those hypothetical situations? Probably not. Cause luckily your body would take care of itself to not forget to breath.

I can imagine that during the plane scenario, I would be in a panicked state. My heart would be racing and I would be sucking wind as fast as I could. Thanks Pituitary and Adrenal Glands. (Fight or Flight Response)

The Reason why I bring this up. Is to illustrate the difference in oxygen consumption. NASM has away to calculate that oxygen consumption.

and here’s how.

The FICK Equation

VO2= Q x A- VO2 difference.


Let’s break it down.

  • Q: Cardiac Output-(Heart Rate x Stroke Volume)
  • A: Arterial-Venous difference( The difference of 02 in the blood in the arteries and the blood in the veins)
  • V02 difference- Is a given number at 3.5 mL Kg min

Unfortunately the book does not explain any further how to calculate the FICK equation.

It also describes V02 Max and says that this is the maximum efficiency of oxygen transportation and utilization during maximal physical exertion. But then it says that to properly measure this you need expensive equipment such as: Rockport Walk Test, The Step Test, and YMCA Bike Protocol Test.

The last part of chapter 3 is Abnormal Breathing Patterns. Which are any difficulty or changes to normal response to exercise. Because the body is undergoing stress during exercise.

Examples of Abnormal Breathing are:

  • Shallow breathing- Quick inhales and exhales.
  • Using the intercostal muscles for respiration- Instead of the diaphragm, the secondary muscles are activated.
This is a person with COPD, It’s kind of gross but the point of this picture is to demonstrate the intercostal muscles.

If you see these arise. Remember it is not your job to diagnose or treat these. Ask the client if they have seen a medical professional. If not then suggestion they do immediately.

Thusly we conclude chapter 3. Which was an explanation of why the cardiorespiratory system is connected tightly to delivery oxygen to the body.

Not a lot of actionable material here.

Hope you enjoyed it.

Stay tuned while we dive into chapter 4. Which is Exercise Metabolism and Bioenergetics.

Remember Live Creatively, See Things in New Perspectives, and Work Passionately

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