Nutrients, body composition and exercise are related to change in bone mineral density in premenopausal women

摘要: This study determined relationships among total energy intake, nutrient body composition, exercise group status, and annual rates of change (slopes) in bone mineral density 66 Caucasian premenopausal women (mean age, 34.4 +/- 2.7) taking calcium supplements. Body composition components measured by dual-energy X-ray absorptiometry included fat mass, soft tissue lean (g/cm2) body, spine (lumbar vertebrae 2-4), three femur sites at baseline, 5, 12, 18 mo. Nutrients were not significant variables regression models predicting slopes (rates change) any site. The only variable Ward's triangle slope was the initial mass and, for trochanter, exercise. Significant (P < 0.05) plus either vitamin A, carotene, fiber, magnesium, or phosphorus (R2 from 0.31 to 0.25) sodium = 0.24). model L2-4 intake 0.17, P 0.05). We conclude that exercise, are related rate relations these vary