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Exhaustive Aerobic Exercise Increases Serum Calcium Levels and Dietary Requirements

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You probably have heard of the fundamental importance of calcium as a structural component of bones . Yet, calcium is way more than the building block of our bone structure and the concrete the of the hopefully non-existent plaque in your arteries. It is also one of the major players in muscle contraction . Thus, it is not very surprising that a group of Iranian Scientists ( Pourvaghar. 2011 ) found major effects of pro-longed (15min) high intensity aerobic exercise on serum calcium levels of 12 randomly selected student athletes (22.36y; 75kg @ 1.76m): […] the participants' mean of serum calcium concentration in the first stage and before Balke exhausting aerobic exercise was measured 98.38 ng/mic L. In the second stage, i.e. after the exhausting aerobic activity, it increased to 114.96 ng/mic L. Research results indicated that the difference in serum calcium concentration between the first and second stages is significant (P= 0.0001). With the calcium that is appearing in the bl...
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Further Evidence: Sunlight Alone is Insufficient to Rise Vitamin D Levels in Non-Western Immigrants

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Wicherts et.al. ( Wicherts. 2010 ) published the results of an investigation into the effectiveness of a) sun exposure or b) supplementation with daily 800 IU or 100,000 IU once in three months on serum 25(OH)-D3 levels in 211 otherwise healthy non-western immigrant in the Netherlands.  As you can see in table 1, the initial high dose of 100.000 IU raised 25(OH)D levels significantly faster but to a lower extent than the 800 IU daily dosing: Table 1: Proportion (%) of participants with serum 25(OH)D<25, 25−50, 50−75, or >75 nmol/l at baseline, 3, 6, and 12 months according to treatment group 800 IU/day, 100,000 IU/3 months or sunshine exposure ( Wicherts. 2010. Table 2 ) Otherwise, Wickerts' study confirms the results of earlier investigations, mean serum 25(OH)D increased to 53 nmol/l with 800 IU/day, to 50.5 nmol/l with 100,000 IU/3 months, and to 29.1 nmol/l with advised sunlight exposure. ...
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