Calcium supplementation and bone mineral density in adolescent girls
Article Abstract:
Calcium supplementation may increase bone mineral density in adolescent girls. Increased bone growth during adolescence may prevent osteoporosis later in life. Among 94 adolescent girls, 46 took 500 milligrams of calcium per day and 48 took a placebo, an inactive substance, over an 18-month period. Bone mineral density in the spine increased 19% in the girls who took a calcium supplement, but only 16% in girls in the placebo group. Total body bone mineral density increased 10% in the girls who took calcium, compared to 8% in the girls who took a placebo. Individuals who develop osteoporosis have a higher risk of bone fractures.
Publication Name: JAMA, The Journal of the American Medical Association
Subject: Health
ISSN: 0098-7484
Year: 1993
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Changes in bone mineral content in male athletes: mechanisms of action and intervention effects
Article Abstract:
Athletes who train intensively may need to take up to 2 grams of calcium a day to prevent loss of bone during training. Researchers measured bone mineral content (BMC) and calcium loss via sweat and urine in 11 college basketball players. BMC declined significantly during the basketball season and the players lost an average of 422 milligrams of calcium during each training session. Calcium supplementation in the second year reversed BMC losses seen during the first year. Calcium loss could explain why many athletes develop stress fractures during competition.
Publication Name: JAMA, The Journal of the American Medical Association
Subject: Health
ISSN: 0098-7484
Year: 1996
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Body composition development of adolescent white females: the Penn State Young Women's Health Study
Article Abstract:
Soft tissues such as fat and lean tissues appear to begin developing sooner in girls than hard tissues such as bone. Researchers used dual-energy X-ray absorptionometry to measure changes in height, weight, body mass index, percentage of body fat, lean body mass, and total bone mineral content and density in 82 11-year-old girls who were followed for seven years. Soft tissues began growing rapidly around 11.5 years of age and reached a peak at age 17.5. However, bone began growing rapidly around 13.5 years of age and also peaked at age 17.5
Publication Name: Archives of Pediatrics & Adolescent Medicine
Subject: Health
ISSN: 1072-4710
Year: 1998
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