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Bone Abstracts (2014) 3 PP231 | DOI: 10.1530/boneabs.3.PP231

Osteoporosis: evaluation and imaging

The impact of physical activity on estimated bone stiffness as assessed by multisite quantitative ultrasound: the Canadian Multicentre Osteoporosis study

Jacques Brown1, Jonathan Adachi2, David Hanley3, Kenneth Davison4 & Wojciech Olszynski5

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1Laval University, Quebec, Quebec, Canada; 2McMaster University, Hamilton, Ontario, Canada; 3University of Calgary, Calgary, Alberta, Canada; 4University of Victoria, Victoria, British Columbia, Canada; 5University of Saskatchewan, Saskatoon, Saskatchewan, Canada.


This investigation sought to assess the relationship between physical activity (PA) and estimated bone stiffness as assessed by multisite quantitative ultrasound (mQUS) in a large cohort. A total of 1177 men and 2949 women were assessed with mQUS (Beam-Med Omnisense quantitative ultrasound; Isreal) at the distal radius, tibia, and phalanx sites as part of the Canadian Multicentre Osteoporosis Study (clinical sites included Saskatoon, Calgary, Hamilton, Quebec City, Halifax and St Johns). Estimated stiffness was provided at each site as speed of sound (SOS, in m/s). Mean estimated weekly hours of moderate PA, vigorous work and strenuous sport in the past year (converted to kcal energy expenditure/week) and mean estimated daily hours of sedentary activity in the past year were gathered by interview. Weekly moderate PA was stratified into lowest (<3000 kcal/w), low (3000 to <6000 kcal/w), moderate (6000 to <9000 kcal/w), high (9000 to <12 000 kcal/w) and highest (≥12 000 kcal/w). Moderate PA, vigorous work and strenuous sport were combined and energy expenditure stratified as above. Lastly, average sedentary hours per day in the past year were stratified into lowest (<10 h/d), low (10 to <15 h/d), moderate (15 to <20 h/d) and high (≥20 h/d). Analysis of variance and Tukey HSD established whether statistical differences among and between groups existed. While there were no significant differences in SOS among groups for mean moderate physical activity per week and mean daily sedentary hours per day, there were significant differences when vigorous work and strenuous sport were added to moderate physical activity.

Distal radius measureLowest mean SOSLow mean SOSModerate mean SOSHigh mean SOSHighest mean SOS
SedentaryNA4046403840454066
Moderate PA40354040405140564064
≥ Moderate PA40254045*4055*4062*4071*
*Significantly different (P<0.05) from lowest mean SOS group.

A low amount of high-intensity physical activity may increase estimated bone stiffness.

Volume 3

European Calcified Tissue Society Congress 2014

Prague, Czech Republic
17 May 2014 - 20 May 2014

European Calcified Tissue Society 

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