BACKGROUND:Many female adolescents participate in insufficient physical activity to maintain cardiovascular fitness and promote optimal bone growth. This study evaluates the impact of a school-based intervention on fitness, activity, and bone among adolescent females. METHODS: Subjects were assigned to an intervention (n = 63) or comparison (n = 59) group, and underwent assessments of cardiovascular fitness (VO2peak), physical activity, body composition, bone mineral density (BMD), bone mineral content (BMC), and serum markers of bone turnover at baseline and at the end of each of two school semesters. RESULTS: The intervention increased physical activity, VO2peak, and BMC for the thoracic spine (P values < 0.05). Bone turnover markers were not affected. In longitudinal analyses of the combined groups, improvements in cardiovascular fitness predicted increased bone formation (P < 0.01) and bone resorption (P < 0.05). CONCLUSION: A school-based intervention for adolescent females effectively increased physical activity, cardiovascular fitness, and thoracic spine BMC.
RCT Entities:
BACKGROUND: Many female adolescents participate in insufficient physical activity to maintain cardiovascular fitness and promote optimal bone growth. This study evaluates the impact of a school-based intervention on fitness, activity, and bone among adolescent females. METHODS: Subjects were assigned to an intervention (n = 63) or comparison (n = 59) group, and underwent assessments of cardiovascular fitness (VO2peak), physical activity, body composition, bone mineral density (BMD), bone mineral content (BMC), and serum markers of bone turnover at baseline and at the end of each of two school semesters. RESULTS: The intervention increased physical activity, VO2peak, and BMC for the thoracic spine (P values < 0.05). Bone turnover markers were not affected. In longitudinal analyses of the combined groups, improvements in cardiovascular fitness predicted increased bone formation (P < 0.01) and bone resorption (P < 0.05). CONCLUSION: A school-based intervention for adolescent females effectively increased physical activity, cardiovascular fitness, and thoracic spine BMC.
Authors: Daheia J Barr-Anderson; Melissa N Laska; Sara Veblen-Mortenson; Kian Farbakhsh; Bonnie Dudovitz; Mary Story Journal: J Phys Act Health Date: 2011-05-13
Authors: Y Wang; L Cai; Y Wu; R F Wilson; C Weston; O Fawole; S N Bleich; L J Cheskin; N N Showell; B D Lau; D T Chiu; A Zhang; J Segal Journal: Obes Rev Date: 2015-04-20 Impact factor: 9.213
Authors: C M Weaver; C M Gordon; K F Janz; H J Kalkwarf; J M Lappe; R Lewis; M O'Karma; T C Wallace; B S Zemel Journal: Osteoporos Int Date: 2016-02-08 Impact factor: 4.507
Authors: Shesh N Rai; Melissa M Hudson; Elizabeth McCammon; Laura Carbone; Francis Tylavsky; Karen Smith; Harriet Surprise; John Shelso; Chin-Hon Pui; Sue Kaste Journal: Contemp Clin Trials Date: 2008-05-18 Impact factor: 2.226