[Physical performance and bone mineral density in a group of young Lebanese adults]

Introduction : The aim of this study was to explore the relationships between performances obtained in different physical tests and bone parameters [bone mineral density [BMD] and bone mineral content [BMC]] in a group of young Lebanese adults

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Methods: One hundred and six young Lebanese adults [45 women and 61 men] whose ages range from 17 to 34 years participated in this study. Weight and height were measured, and body mass index [BMI] was calculated. Daily calcium intake, daily protein intake and physical activity level [h/week] were evaluated using validated questionnaires. The level of physical performance was measured using several physical tests: vertical-jump test, standing long jump test, 3-jumptest, 5-jump-test and 1-RM half-squat. Body composition, bone mineral content [BMC] and BMD at whole body [WB], lumbar spine [L2-L4], total hip [TH] and femoral neck [FN] were measured by dual-energy X-ray absorptiometry [DXA]

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Results: In women, height, lean mass, 1- RM half-squat and performances obtained in three physical tests [vertical jump test, 5-jump-test and 1-RM half squat] were positively correlated to BMD and BMC. In men, lean mass and 1-RM half-squat were positively correlated to BMD and BMC

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Conclusion: This study suggests that lean mass and maximum strength obtained in half-squat are positively correlated to BMD in young adults