At the end of the day, it is always calories in = calories out (even for the small minority of people who have metabolic disorders, assuming normalization). ....
Here a thought about calories in(CI) = calories out(CO).
The concept people try to convey with with respect to losing weight is
that if CI < CO you lose weight and if CI > CO you gain weight and CI=CO weight stays the same.
So to lose weight all you have to do eat less and exercise more. Right? Wrong.
Millions of dieter doing just that fail over and over and it’s not that all of them are not
trying or maintaining their CI < CO life style.
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Case: Kate training as an Ironman athlete.
Training 15 to 20 hours a week, sports = swimming, biking and running.
Many days included “brick” works outs = all three events back to back.
Some days were double workouts.
Workouts were about 500 calories so total calories about 10,000 per week.
Plus her daily requirements were 1800cals for dressing.eating etc.
She lost weight and was eating 1500 cals/day.
Calories IN was about half of what she needed.
At some point in this routine, NOT changing anything in Calories IN and Calories OUT
she began gaining weight!!!
She gained back 65pounds while still maintaining 1500 calories and her exercise routine.
HOW IS THIS POSSIBLE???? Her times got slower and slower and she became
depressed. Wouldn’t YOU???
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The reason for Kate's issue is labeled 'Diet FOG'.
The body doesn’t see the excess fat being stored it just sees the
Lack of Calories IN and goes into a protection mode and begins storing energy as fat!
This is part of the reason diets fail people but this is just the beginning.
This survival mechanism is just one aspect of the metabolic machinery.
If you want to learn more I highly recommend reading the book
"The Metabolic Storm" by Doctor Emily Cooper. (Kate example is from her book)