Farnell Gregory S, Williams Valerie J, Bogda Bristin
Dep. of Exercise Science and Sports Studies, John Carroll University, 1 John Carroll Blvd., University Heights, OH 44118- 4581, USA. Tel 216-397-1681.
Med Probl Perform Art. 2018 Jun;33(2):90-94. doi: 10.21091/mppa.2018.2015.
The bone mineral density (BMD) status of dancers is currently unknown. Some research indicates that female dancers have no difference or higher BMD than non-dancers. Other evidence indicates they have lower BMD, predisposing them to osteoporosis and fractures later in life. These differences among studies may be due to differences in dancer type, age, level, and lack of control of confounding variables. Few studies have been completed on college-level dancers.
To evaluate BMD in female college-level dance majors.
20 female multi-genre collegiate dance majors and 12 female non-dancer control subjects participated in the study. Each participant underwent three consecutive dual energy x-ray absorptiometry scans to determine BMD of the total body, dual femurs, and lumbar spine. Statistical analysis was completed by an independent samples t-test.
The lumbar spine demonstrated a significant difference between groups (p=0.011), with dancers showing greater BMD (1.32±0.10 vs 1.21±0.12 g/cm2). There was no significant difference between groups for total body or dual femur BMD (p=0.104 and 0.175, respectively).
College-level dancers may have higher BMD of their lumbar spine than non-dancers, but not in other areas. This area may have increased BMD due to loading from dance activity and warrants further investigation.
目前尚不清楚舞者的骨密度（BMD）状况。一些研究表明，女性舞者的骨密度与非舞者相比没有差异或更高。其他证据表明，她们的骨密度较低，这使她们在晚年易患骨质疏松症和骨折。研究之间的这些差异可能是由于舞者类型、年龄、水平的不同以及混杂变量缺乏控制所致。针对大学水平舞者的研究很少。
评估大学水平女性舞蹈专业学生的骨密度。
20名多舞种大学舞蹈专业女生和12名非舞者女性对照受试者参与了该研究。每位参与者连续进行三次双能X线吸收测定扫描，以确定全身、双侧股骨和腰椎的骨密度。通过独立样本t检验完成统计分析。
两组在腰椎骨密度上存在显著差异（p = 0.011），舞者的骨密度更高（1.32±0.10 vs 1.21±0.12 g/cm²）。两组在全身或双侧股骨骨密度上无显著差异（分别为p = 0.104和0.175）。
大学水平的舞者腰椎骨密度可能高于非舞者，但其他部位并非如此。该部位可能由于舞蹈活动的负荷而骨密度增加，值得进一步研究。
