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Bone Abstracts (2013) 1 PP292 | DOI: 10.1530/boneabs.1.PP292

ECTS2013 Poster Presentations Muscle, physical activity and bone (26 abstracts)

Sex-specific association of physical activity with bone mass distribution at the femoral neck and trochanter in young adults

Vera Zymbal , Lurdes Rebocho , Graça Cardadeiro & Fátima Baptista


Exercise and Health Laboratory, Faculty of Human Movement, Interdisciplinary Centre for the Study of Human Performance, Technical University of Lisbon, Lisbon, Portugal.


Women suffer more fragility fractures in old age and have a higher incidence of fractures at the femoral neck region compared to men who have higher incidence of trochanteric femoral fractures. The purpose of this cross-sectional study was to analyze associations between physical activity (PA) and bone mass distribution at the femoral neck (FN) and trochanter (TR) in young adults. A left hip DXA scan was used to measure bone mineral density (BMD) at the integral, superolateral (SL) and inferomedial (IM) FN, and TR sub-regions in 38 women (age: 23.5±2.9 years; BMI: 22.3±3.3 kg/m2) and 31 men (age: 24.2±3.6 years; BMI: 23.1±2.3 kg/m2). These sub-regions were used to represent bone mass distribution via two BMD ratios – FN:TR and IMFN:SLFN. PA was evaluated with the Actigraph GT1M accelerometers over 7 days. Partial correlation analyses adjusted for body mass revealed in males associations of FN:TR BMD ratio with sedentary (r=0.449) and active time (r=−0.467) (P<0.05) and associations of IMFN:SLFN BMD ratio with light PA (r=−0.463). In females it was not found significant associations between BMD ratios and PA variables, despite a trend in the association of FN:TR BMD ratio with sedentary time (r=−0.330, P=0.53) and steps/day (r=0.304, P=0.075). In conclusion, PA seems to be related with bone mass distribution in males with a more active lifestyle (independent of PA intensity) to favor the BMD of the TR sub-region and a light PA to favor the SL sub-region of the FN. Potential associations in females appear however to have a contrary relationship with a more active lifestyle to promote the FN compared to the TR sub-region.

Volume 1

European Calcified Tissue Society Congress 2013

Lisbon, Portugal
18 May 2013 - 22 May 2013

European Calcified Tissue Society 

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