Does Exercise Really Make Us Thinner?
<p>Feb 10, 2008 7:38 PM
 
Excellent Summary by Gary Taubes ...
 
Note:  I SAVED this article on my computer ... see TAUBES folder.
 
All exercise does is increase your appetite.
 
INSULIN is the big villain...
 
CARBS drive INSULIN which which drives FAT  (see page 5 of this article)
George CAHILL, retired Harvard prof of medicine and an expert on insulin.
 
LEAN PEOPLE ARE MORE PHYSIC ACTIVE THAN THIN PEOPLE - established!
 
Finnish study on exercise in 2000 was the most definitive
 
There's no reason to think we will lose signif weight by exercising.
 
XC increase your appetite and you eat more.
 
Calorie intake just tracks energy expenditure.
Workout like a lumerjack 5000 cal per day and you'll eat like one.
 
(In Taubes lecture, he says  In=Out  to within .1%  !!!!  carefully regulated.
 
XC crze began in the late sixties and by 1977 there was an XC explosion.
 
Incr exercise leads to incr. food consumption.  "WORKING UP AN APPETITE!"
 
page 5:  Insulin interacts with LPL  (sex hormones also interact, so men and women fatten differently)
 
In the eighties, biochemists and physiologists worked out how LPL responds to exercise. They found that during a workout, LPL activity increases in muscle tissue, and so our muscle cells suck up fatty acids to use for fuel. Then, when we’re done exercising, LPL activity in the muscle tissue tapers off and LPL activity in our fat tissue spikes, pulling calories into fat cells. This works to return to the fat cells any fat they might have had to surrender—homeostasis, in other words. The more rigorous the exercise, and the more fat lost from our fat tissue, the greater the subsequent increase in LPL activity in the fat cells. Thus, post-workout, we get hungry: Our fat tissue is devoting itself to restoring calories as fat, depriving other tissues and organs of the fuel they need and triggering a compensatory impulse to eat. The feeling of hunger is the brain’s way of trying to satisfy the demands of the body. Just as sweating makes us thirsty, burning off calories makes us hungry.
 
Insulin is the primary regulator of LPL.  We get fat cuz insulin is too high or remains elevated far too long.
 
 
 
 
 
 
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