Bone Quality in Female Ballet Dancers: A Possible Determinant of Bone Health

Hypotheses:Values of serum markers related to bone quality are abnormal in young female ballet dancers. Methods: 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. Results: Two dancers had fatigue fractures and 3 had a history of secondary amenorrhea. The average BMD was 1.305 ± 0.12 (g/cm2), 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. Conclusion: Latent deterioration of bone quality may occur in female athletes with secondary amenorrhea and otherwise normal BMD and calcium metabolism markers.

芭蕾舞专业学生普拉提核心力量训练法的实验研究

本文以北京舞蹈学院附中芭蕾舞专业17名男生作为研究对象(其中实验组8人,对照组9人),运用运动人体科学的理论和方法,针对普拉提训练对提高舞蹈专业学生核心力量方面的作用进行实验性研究。结果表明,经过8周的普拉提训练,实验组学生的核心力量明显优于对照组。同时,对受试者和专业教师进行的调查结果也同样显示,普拉提训练对舞者核心力量及其对芭蕾训练效果具有明显的提高作用。本文研究结果说明,普拉提训练能够有效提高舞者的核心力量,对舞者身体能力及其技术水平的提高具有积极的作用。

不稳定条件训练对提高芭蕾舞女生核心力量作用的研究

不稳定条件训练是指在不稳定支撑条件下进行的训练,是一种对本体感觉有特殊刺激作用的辅助训练方法。本研究以北京舞蹈学院附中芭蕾舞专业12名女生为研究对象,运用人体科学的基础理论和实验方法,论证不稳定条件训练对于提高芭蕾舞女生核心力量的作用,并针对芭蕾舞者,研究论证了一套提高其核心力量的不稳定小器械训练手段和动作方法。

捕捉人性瞬间的真实——法国艺术家埃德加·德加

德加的艺术既是古典艺术的尾声,又是西方现代艺术的发端。他的作品内容多以芭蕾舞者、浴女和赛马为表现主题,在艺术造型语言的发挥上,绘画和雕塑交相辉映;在反映人性的真实状态方面,他的作品深受毕加索和弗洛伊德的青睐。其雕塑在痕迹、感触和材料的运用方面具有超前探索精神,造型语言风格突出,个性鲜明,对后来的西方艺术影响深远。