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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., 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)., 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 halfsquat) were positively correlated to BMD and BMC. In men, lean mass and 1-RM half-squat were positively correlated to BMD and BMC., Conclusion: This study suggests that lean mass and maximum strength obtained in half-squat are positively correlated to BMD in young adults.

Introduction: The aim of this study was to explore the relationship between sleep quality and bone mineral density (BMD) of the hip in a group of young Lebanese men., Methods and Results: Fourteen Lebanese young men from 18 to 30 years (mean age 22.6 years) participated in this study. Weight and height were measured and body mass index (BMI) was calculated. BMD of the total hip (TH) and the femoral neck (FN) was measured by DXA. Daily protein intake (DPI), daily calcium intake (DCI) and sleep quality were evaluated by validated questionnaires. The Pittsburgh sleep quality index (PSQI) was used to assess sleep habits and quality; higher scores represent worse sleep quality. Weight, height, BMI, DCI, DPI and sleep duration were not correlated to BMD values. The Pittsburgh sleep quality index was negatively correlated to femoral neck BMD (r = -0.82; p < 0.001) and to TH BMD (r = -0.54; p < 0.05)., Conclusion: This study suggests that poor sleep quality affects negatively BMD of the hip in young adult men. Our findings may lead to the development of better preventive approaches to osteoporosis.

Aim of the Study: The aim of this study was to compare geometric indices of hip bone strength in male professional soccer players and controls., Methods: Twenty-three male professional soccer players and 21 male sedentary subjects whose ages range between 18 and 30 years participated in this study. Weight and height were measured, and body mass index (BMI) was calculated. Daily calcium intake and physical activity were evaluated using validated questionnaires. Hip bone mineral density was measured by dual-energy X-ray absorptiometry (DXA). To evaluate hip bone geometry, DXA scans were analyzed at the narrow-neck (NN), the intertrochanteric (IT) region and the femoral shaft (FS) by the Hip Structure Analysis (HSA) program. Cross sectional area (CSA), an index of axial compression strength, cross sectional moment of inertia (CSMI), an index of structural rigidity, section modulus (Z), an index of bending strength, cortical thickness (CT) and buckling ratio (BR) were measured from bone mass profiles., Results: CSA, CSMI, Z and CT of the three regions (NN, IT and FS) were higher in soccer players compared to controls. After adjustment for either age, body weight, height or physical activity duration (h/week), CSA, CSMI, Z and CT of the three regions remained higher in soccer players compared to controls., Conclusion: This study suggests that, in young adult males, soccer practice is associated with greater axial strength, bending strength and structural rigidity indices at the hip.