chapter  25
8 Pages

Calcium, Other Nutrients, Exercise, and Bone Health in Twins

One powerful factor associated with changes in bone measures is the change in body composition during growth and maturation, as demonstrated in 8-to 26-year-old female twins (Young et al., 2001). For example, lean mass increases correlate strongly with bone mass changes during linear growth, that is, up to approximately 16 years of age in females, and variations in fat mass become a biologically signi„cant determinant of variation in bone mass after the age of 16 years.