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Testosterone and Running

Posted Nov 17 2008 9:11pm 1 Comment

A good bit of research shows that long-term endurance training is associated with lowered testosterone levels.  There is much less research showing the effects of sprint training on testosterone levels.

However, I did manage to find a short study on this:  Journal of Sports Sciences, Vol. 23, Issue 2, February 2005, pg. 187-188 (no abstract).  Here they compare testosterone levels among different groups of males:

  • Sprint Trained -   9.11 (ng/l)
  • Endurance Trained -   7.05 (ng/l)
  • Sedentary -   8.19 (ng/l)

Since this data is a cross-section, it does not establish cause-and-effect.  In other words, it's possible that men with low testosterone self-select into endurance running, and men with high testosterone self-select into sprint running.  However, this data is very suggestive that sprint training may increase testosterone in men.

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Since this data is a cross-section, it does not establish cause-and-effect.  In other words, it's possible that 640-721 men with low testosterone self-select into endurance running, and men with high testosterone self-select into sprint 1z0-043 running.  However, this data is very suggestive that sprint training may increase testosterone in men.   000-669 

I give these shoes high marks.  They are a bit expensive, but if you stand a lot at work (like I do) then 642-832 they are worth it.  I put a heel liner in the back of the shoes for comfort, but other than that they already feel broken in and comfortable on the second day.

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