A one-year exercise intervention program in pre-pubertal girls does not influence hip structureReportar como inadecuado

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BMC Musculoskeletal Disorders

, 9:9

First Online: 24 January 2008Received: 29 August 2007Accepted: 24 January 2008


BackgroundWe have previously reported that a one-year school-based exercise intervention program influences the accrual of bone mineral in pre-pubertal girls. This report aims to evaluate if also hip structure is affected, as geometry independent of bone mineral influences fracture risk.

MethodsFifty-three girls aged 7 – 9 years were included in a curriculum-based exercise intervention program comprising 40 minutes of general physical activity per school day 200 minutes-week. Fifty healthy age-matched girls who participated in the general Swedish physical education curriculum 60 minutes-week served as controls. The hip was scanned by dual X-ray absorptiometry DXA and the hip structural analysis HSA software was applied to evaluate bone mineral content BMC, areal bone mineral density aBMD, periosteal and endosteal diameter, cortical thickness, cross-sectional moment of inertia CSMI, section modulus Z and cross-sectional area CSA of the femoral neck FN. Annual changes were compared. Group comparisons were done by independent student-s t-test between means and analyses of covariance ANCOVA. Pearson-s correlation test was used to evaluate associations between activity level and annual changes in FN. All children remained at Tanner stage 1 throughout the study.

ResultsNo between-group differences were found during the 12 months study period for changes in the FN variables. The total duration of exercise during the year was not correlated with the changes in the FN traits.

ConclusionEvaluated by the DXA technique and the HSA software, a general one-year school-based exercise program for 7–9-year-old pre-pubertal girls seems not to influence the structure of the hip.

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Autor: Gayani Alwis - Christian Linden - Susanna Stenevi-Lundgren - Henrik G Ahlborg - Jack Besjakov - Per Gardsell - Magnus K K

Fuente: https://link.springer.com/

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