Relative importance of lean and fat mass on bone mineral density in a group of adolescent girls and boys |
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Authors: | Rawad Philippe El Hage Daniel Courteix Claude-Laurent Benhamou Christophe Jacob and Christelle Jaffré |
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Institution: | (1) UMR-S658, CHR d’Orléans, CHR d’Orléans-Porte Madeleine, BP 2439, 45032 Orléans Cedex 1, France;(2) Laboratoire de physiologie et de biomécanique de la performance motrice, Université de Balamand, Al Koura, Liban;(3) Department of Physical Education, Faculty of Art and Social Science, University of Balamand, P.O. Box 100, Tripoli, Lebanon;(4) Antelias-Metn, rue principale, immeuble Abdallah Jabbour, près pharmacie, Antelias, Liban |
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Abstract: | The aim of this study was to determine the relative importance of lean mass (LM) and fat mass (FM) on bone mineral density
(BMD) in a group of adolescent girls and boys. A total of 65 adolescent boys and 35 adolescent girls participated in this
study. Whole body (WB) and lumbar spine (L1–L4) BMD were measured by dual-energy X-ray absorptiometry (DXA). Body composition
was assessed using the same technique. In boys, LM was strongly related to WBBMD (r = 0.68; p < 0.001) and to L1–L4 BMD (r = 0.61; p < 0.001), whereas FM was not positively related to BMD and was negatively associated with WB bone mineral apparent density
(WBBMAD). In girls, both LM and FM were positively related to WBBMD (r = 0.41; p < 0.05 and r = 0.49; p < 0.01, respectively), whereas only FM was correlated to L1–L4 BMD (r = 0.33; p < 0.05). Finally, in a multiple regression analysis, FM was found to be a better positive determinant of WBBMD than LM in
girls, whereas in boys, FM was found to be a negative determinant of WBBMD and L1–L4 BMD. This study suggests that LM is a
strong determinant of WBBMD and L1–L4 BMD in boys, and that FM is a stronger determinant of WBBMD than LM in girls. |
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Keywords: | Gender differences Adolescence Body composition DXA |
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