%0 Journal Article
%T Bone Quality in Female Ballet Dancers: A Possible Determinant of Bone Health
%A Hiroki Funasaki
%A Mitsuru Saito
%A Mayumi Kuno-Mizumura
%A Hiroteru Hayashi
%A Keishi Marumo
%J Open Journal of Orthopedics
%P 284-293
%@ 2164-3016
%D 2017
%I Scientific Research Publishing
%R 10.4236/ojo.2017.79028
%X <b>Hypotheses:</b><b></b>Values
of serum markers related to bone quality are abnormal in young female ballet
dancers. <b>Methods:</b> In 13
elite Japanese female ballet dancers (average age, 22 years), markers related
to bone quality were investigated. These included: serum homocystein (HC), a
marker of increased oxidative stress; pentosidine (Pent), a marker of
glycation- or oxidation-induced non-enzymatic cross-links; markers of bone
metabolism (bone alkaline phosphatase, BAP; tartrate-resistant acid phosphatase
5b, TRAP5b) and bone mineral density (BMD). It was determined whether there is
a relationship between bone quality markers¡¯ levels are related to amenorrhea
and/or fatigue fractures. <b>Results</b>: Two dancers had fatigue fractures and
3 had a history of secondary amenorrhea. The average BMD was 1.305 ¡À 0.12 (g/cm<sup>2</sup>),
in all these cases the Z-score was higher than -1.0. Although the serum levels
of BAP, TRAP5b, and HC were normal in all examined dancers, in 2 out of 3
dancers with a history of secondary amenorrhea, pentosidine serum levels were
increased. No relationship between bone quality markers¡¯ levels and fatigue
fractures was found. <b>Conclusion</b>:
Latent deterioration of bone quality may occur in female athletes with
secondary amenorrhea and otherwise normal BMD and calcium metabolism markers.
%K Bone Quality
%K Bone Mineral Density
%K Female Athletes
%K Ballet Dancer
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=79293