Tuesday, May 18, 2010

Wednesday WOD - Ketosis: What is it and how does it work?

WOD
"CrossFit Total"
1 rep Squat max, 3 attempts
1 rep Press max, 3 attempts
1 rep Deadlift max, 3 attempts

Warm up to the weight first, then attempt your maxes. Post loads to comments.

Ketosis: What is it and how does it work?
Ketosis is a state in which your body produces chemicals called ketones, which are an alternative fuel source to glucose for many bodily tissues. Typically this occurs during starvation, when the body uses gluconeogenesis to convert muscle tissue protein to glucose in the liver, in the body's effort to save muscle tissue. By substituting ketones, which are made from fat, for glucose in fueling much of the body's systems, there is less of a need to convert muscle protein into glucose, thereby preserving muscle mass.
Ketosis has also been shown as a possible treatment for cancer, because cancer cells cannot metabolize ketones as well for energy as the rest of the body, they need glucose. Ketogenic diets have shown promise for slowing, stopping and even reversing the growth of tumors.
Dr. Michael Eades has written an excellent post drawing out how ketosis works in better detail and why it is the best state to be in if you want to lose fat while preserving muscle mass. He also provides instructions on how to use ketosis to your advantage. In the second post, Dr. Eades explains how ketosis helps our cells clear out cellular debris, helping to prevent the buildups of junk proteins within cells, which is a  contributing factor to aging.
Metabolism and Ketosis
Ketosis Cleans Our Cells
Here is a paper from Nutrition and Metabolism showing that low-carb diets do not necessarily reduce performance in athletes.
Ketogenic Diets and Physical Peformance

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