Behavioral Intervention in Adolescents Improves Bone Mass, Yet Lactose Maldigestion Is a Barrier.

Calcium intake during adolescence is important for attainment of peak bone mass. Lactose maldigestion is an autosomal recessive trait, leading to lower calcium intake. The Adequate Calcium Today study aimed to determine if a school-based targeted behavioral intervention over one year could improve calcium intake and bone mass in early adolescent girls.

Impact of activity behaviors on physical activity identity and self-efficacy.

Objective: To examine the relationship of level of physical activity and length of time of adherence to physical activity, with physical activity identity (PAI) and physical activity self-efficacy (PASE).

Methods: In a cross-sectional design, 409 adults completed a survey assessing activity level and adherence, PAI and PASE.

Results: Vigorous activity was associated with higher scores on PAI and PASE scales with activity level contributing significantly larger proportions of the variance in scores compared to adherence.