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Relative importance of lean and fat mass on bone mineral density in a group of adolescent girls and boys
Ist Teil von
European journal of applied physiology, 2009-03, Vol.105 (5), p.759-764
Ort / Verlag
Berlin/Heidelberg: Springer-Verlag
Erscheinungsjahr
2009
Link zum Volltext
Quelle
SpringerLink (Online service)
Beschreibungen/Notizen
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.