Determination of basal bone mineral density in the femur bones of male and female Wistar rats.

Changes in bone mineral content of calcium (Ca), phosphorous (P), magnesium and potassium for male and female Wistar rats during their development from 3 weeks old to adulthood (27 weeks old) were measured. Bone mineral content was related to areal bone mineral density (BMD) which was measured in vivo at the femoral neck using a calibrated X-ray transmission system to obtain basal curves as a function of the age of the specimen. Diagnostic curves were built to determine low BMD (osteopaenia) and osteoporosis in female rats fed a Ca-depleted diet (50%) based on the obtained data and the criteria established by the World Health Organization.

Differences in Body Composition in Older People from Two Regions of Mexico: Implications for Diagnoses of Sarcopenia and Sarcopenic Obesity.

Background: Mexico is a country that is rich in ethnicity and cultural diversity, divided into three well-defined socioeconomic, ecological, and epidemiological areas. However, we do not know the influence that these factors may have on body composition. Therefore, this study was designed to assess body composition and compare appendicular skeletal muscle mass (ASM) in older people from two areas of the country.

[BREAST FEEDING AS PREVENTIVE FACTOR FOR OSTEOPOROSIS IN ADULT WOMEN].

Introduction: breastfeeding is considered protective of osteoporosis, by endocrine changes, such as the rise of intestinal absorption of calcium and the renal conservation of the same, however, other studies demonstrate that with more one child they present a loss of bone mineral density (BMD) (2-9%).

Objective: to determine if breastfeeding is a protective factor or a risk in osteoporosis in Queretaro's women.

Subjects And Methods: retrospective study of cases y controls.

[Effect of dietary calcium vs calcium citrate on conventional biochemical markers in perimenopausal women].

Objective: To compare the effect of calcium citrate and a calcium enriched diet on conventional biochemical markers.

Material And Methods: Eighty-two women aged 30 to 35 years were randomized to any of three groups:A control group of 23 women who remained intact in their dietary habits and physical activity; a second group of 28 women who received 1000 mg of dietary calcium plus physical activity 30 minutes three times per week; and a third group of 31 women who received 600 mg of calcium citrate plus 500 mg of dietary calcium and physical activity three times per week for seven months. Calcaneum bone densitometry was measured to classify women into normal and osteopenic groups.