question on energy usage

[BBTake2]

I am trying to understand the chronological order in which our body uses energy, and in particular how different physical activities change that order:

Here is my understanding of order:

Regular non keto nutrition

Sedentary, or relaxing:

Blood sugar
Glycogen
Fat

Low intensity activity below 120 heart rate:
Blood sugar
Fat
Muscle into glucose

High intensity activity:
Blood sugar
Glycogen
Muscle into glucose

Weight training - same as high intensity activity


Ketosis
Low intensity/ sedentary:
Fat


High intensity incl. Weights:
Avail glycogen
Muscle into glucose


First off, if I am mistaken in any above please help me out.

Also, a ? I have is if my above assumptions are correct, it would make sense that we really can't tap into bodyfat until we really deplete our glycogen stores when doing non keto nutrition, is that true.

Let me state that I fully understand this is far more complex than I am making it out to be, and I am looking to understand some of the variables involved in this as well.

[rhizome]

Wow. That ^ post is so full of fail. You've completely missed the boat.

You need to do some research on RER bro.

There is NO chronological order per say. You are using many sources at the same time. Proportional and duration based changes are evident.

When you are sitting on your duff, fat is the greatest contributor regardless. Blood glucose is rarely a primary contributor vs muscle glycogen unless the activity is longer.

You can burn fat even if you have glycogen.

I don't have the time to correct the rest of your mess. Terrible. Terrible. Terrible.

[BBTake2]

Wow. That ^ post is so full of fail. You've completely missed the boat.

You need to do some research on RER bro.

There is NO chronological order per say. You are using many sources at the same time. Proportional and duration based changes are evident.

When you are sitting on your duff, fat is the greatest contributor regardless. Blood glucose is rarely a primary contributor vs muscle glycogen unless the activity is longer.

You can burn fat even if you have glycogen.

I don't have the time to correct the rest of your mess. Terrible. Terrible. Terrible.

Your response was rude and imo unwarranted.

The point of my post is to say I don't understand this stuff and am looking for help.

The post was NOT intended to teach, I was putting out questions and asking for clarification on what I felt was a lack of understanding.

Rather than criticize, if you have something to offer, offer, if not learn how to comprehend so you can better understand intent of posts.

[schismatik]

I have a question and since it's related to thread on energy usage, i'll post it here if anyone can answer. When doing HIIT it's my understanding that your body goes for glycogen if there's no carbs in ya, but while in keto you're mostly depleted for the most part. I'm curious as to from what muscle groups does HIIT take up the most glycogen from? I'm assuming it's legs, but do the rest of the body get affected as greatly?

[in10city]

Agreed on the lack of exclusive substrate use - it's usually not one at a time and is a intensity, duration, and availability based distribution.

I would agree that some basic research on the Respiratory exchange ratio [RER] is warranted. During inactivity, RER is ~0.8 - which means that fat is the substrate that is being featured to a high percentage.

During execise: http://www.brianmac.co.uk/esource.htm

As mentioned, blood glucose does not contribute to a large degree until the exercise duration becomes longer duration compared to muscle glycogen. Liver glycogenolysis is occurring during both resistance and aerobic training too.

I'm not familiar with keto so I cannot comment on that.

[BBTake2]

Agreed on the lack of exclusive substrate use - it's usually not one at a time and is a intensity, duration, and availability based distribution.

I would agree that some basic research on the Respiratory exchange ratio [RER] is warranted. During inactivity, RER is ~0.8 - which means that fat is the substrate that is being featured to a high percentage.

During execise: http://www.brianmac.co.uk/esource.htm

As mentioned, blood glucose does not contribute to a large degree until the exercise duration becomes longer duration compared to muscle glycogen. Liver glycogenolysis is occurring during both resistance and aerobic training too.

I'm not familiar with keto so I cannot comment on that.

Thanks for the RER info. New info to me, and I did in fact look it up.

This is exactly the type of info/dialog I was hoping for. There is a ton of knowledge on this forum and I am just looking to learn.

If anyone else has any info they can point me to, I love reading and researching, just need a bit of direction!

Thanks again!