Incident fall risk and physical activity and physical performance among older men: the Osteoporotic Fractures in Men Study.

Physical activity and physical performance have been linked to fall risk in the elderly. The authors examined the relation between physical activity and physical performance with incident falls in the Osteoporotic Fractures in Men Study, a large prospective cohort study of 5,995 community-dwelling men in the United States at least 65 years of age. The authors also examined what types of activities are associated with falling.

Fracture healing: bone healing, fracture management, and current concepts related to the hand.

Bones fracture frequently and often result in significant impairments, functional limitations, and disabilities, especially when the hand is involved. When fractures occur, there is a disruption of the skeletal tissue organization and a loss of mechanical integrity. The goal of fracture healing is to regenerate mineralized tissue in the fracture area and restore mechanical strength to the bone.

Seasonal interaction of serum vitamin D concentration and bone density in alpacas.

Objective: To evaluate temporal changes in bone mineral density associated with seasonal variation in serum vitamin D, calcium, and phosphorus concentrations in alpacas.

Animals: 5 healthy mature neutered male alpacas.

Procedure: Metacarpal bone mineral density was measured at 4 times during a year.

Anthropometric estimation of bone mineral content in young adult females.

It was hypothesized that improved prediction of bone mineral content (BMC) would be achieved by an expanded battery of anthropometric variables beyond height and the four extremity diameters used by previous investigators to predict skeletal mass (r = 0.74). Accordingly, sitting height, trunk diameters, chest depth, and head circumference, as well as whole body BMC and bone mineral density (BMD) via dual-energy X-ray absorptiometry (DEXA), were also measured on 52 young adult females (26 each Blacks and Whites), aged 18 to 30 years.