Mon, Jul-18-11, 09:09
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Finding the Pieces
Posts: 17,049
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Plan: Mishmash
Stats: 365/308.0/185
BF:
Progress: 32%
Location: Maryland, US
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Quote:
Originally Posted by madpiano
But doesn't just lying in the sun increase VitaminD?
So taking up jogging or any other outdoor sport without smothering oneself with sun block should do the trick?
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Since vitamin D production can only be produced between 11-3 when the sun is at its highest and only during 7-9 months of the year most places, just being in the sun while clothed, while jogging is not sufficient.
For the body to generate sufficient vitamin D from the sun it requires that 80% of the body's skin be exposed to sun that enables vitamin D production for 20+ minutes. This is a short window in both time of day and season. Ability to produce vitamin D from the sun also depends on the person's age and skin color.
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