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| | Bone mineral density among haredi youth (Site not responding. Last check: 2007-11-07) |
 | | The authors, who used a device to check bone density and conducted a physical examination of each volunteer, found that BMD in the boys was "significantly decreased in ultra-Orthodox Jewish adolescents," and that the males had "profoundly lower spinal BMD" than the girls. |
 | | Aside from inadequate production of sex steroids (which was not relevant in the 50 teenagers), the main causes of low bone density in teenagers are inadequate physical activity, calcium intake, and vitamin D stores (from sunlight conversion of precursors to vitamin D, and to a lesser degree from dietary intake), the researchers noted. |
 | | The haredi youngsters, especially the boys, were found to get much less exercise than other teenagers and to remain indoors studying for long hours; since their traditional dress covers most of their bodies, their skin is less exposed to sunlight when they are outside. |
| www.azamra.org /Heal/Bones.htm (677 words) |
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