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Tue, 6 May 2008 09:14:34 -0700 |
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Fascinating that that comes from Sears who is a former trainer to teams of endurance athletes. Good info.
Jim Swayze
www.fireholecanyon.com
> -------- Original Message --------
> Subject: Dr Sears on paleo exercise
> From: Paleogal <[log in to unmask]>
> Date: Mon, May 05, 2008 4:40 pm
> To: [log in to unmask]
>
> snip
>
> "Endurance training forces your heart and lungs to supply energy at
> continuous, low output, at relatively slow speed, for a long time. Long
> duration exercises tells your body to store more fat in order to meet the
> unnatural caloric demands you're placing on it by running all those miles.
> So when your body's at rest, it's busy getting fatter, not leaner.
>
> "This type of exercise also puts your body in distress mode. It releases the
> stress hormone cortisol, which actually boosts triglyceride blood levels and
> cholesterol oxidation - both things that can clog your arteries and cause
> heart attacks. Cortisol also lowers serum testosterone and growth hormone
> levels, which can lead to depression, decreased muscle mass, and clouded
> thinking.
>
> A groundbreaking study of long-distance runners found that after a workout,
> "bad" cholesterol and triglyceride levels increased and threw blood-clotting
> factors off-balance, increasing inflammation and clotting incidence. These
> are both signs of heart distress and precursors to heart attack.
>
> What you should focus on are high-intensity, short duration exercise
> routines. These mimic the natural physical demands our pre-historic
> ancestors confronted every day. Sudden, explosive bursts of speed - to
> escape danger or capture prey - gave them lean, fit bodies."
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