Department of Health and Human Sciences, Loyola Marymount University, Frank R. Seaver College of Science and Engineering, Los Angeles, California.
J Strength Cond Res. 2023 Aug 1;37(8):1654-1659. doi: 10.1519/JSC.0000000000004449. Epub 2023 Jan 24.
Brimacomb, OE, Martinez, MP, McCormack, WP, and Almstedt, HC. A 2-year longitudinal study of bone mineral density in collegiate distance runners. J Strength Cond Res 37(8): 1654-1659, 2023-The purpose of this investigation was to examine changes in bone mineral density (BMD) of male and female collegiate distance runners over 2 years. Bone mineral density of 29 collegiate distance runners (16 men and 13 women) were measured 5 times over 24 months using dual-energy x-ray absorptiometry (DXA) at the anterior-posterior (AP) and lateral (LAT) spine, femoral neck (FN), total hip (TH), whole body (WB), and ultradistal (UD) forearm. Repeated-measures multivariate analysis of covariance, with bone-free lean mass (BFLM) as covariate, was used to compare mean BMD values. Adjusted for BFLM, there were no significant differences ( p > 0.05) in BMD at any site between sexes. There were no significant differences at the AP or LAT spine, FN, or WB between visit 1 and 5 for either sex. There was a significant increase in BMD ( p = 0.044) at the UD forearm over 2 years in males. However, 56% of the men ( n = 9) had a Z-score < -1.0 at the UD forearm. Seven of 11 women had Z-scores < -1.0 at the LAT spine and 4 of 13 had Z-scores < -1.0 at the AP spine. There were no significant changes in BMD at any site over the 2-year time frame, except a significant increase in BMD at the nondominant forearm in men. The spine appears to be an area of concern for women in this study when examining Z-score results. Coaches and medical staff need to continually educate collegiate endurance athletes about the importance of achieving and maintaining BMD through their college years.
布雷马克姆、奥埃、马丁内斯、麦考马克和阿尔姆施泰特。大学生长跑运动员骨密度的 2 年纵向研究。J 力量与调理研究 37(8):1654-1659, 2023-本研究旨在探讨男性和女性大学生长跑运动员在 2 年内骨密度（BMD）的变化。使用双能 X 射线吸收法（DXA）对 29 名大学生长跑运动员（16 名男性和 13 名女性）的前-后（AP）和侧（LAT）脊柱、股骨颈（FN）、全髋（TH）、全身（WB）和超远端（UD）前臂进行了 5 次测量，共 24 个月。使用协方差重复测量多变量分析，以骨游离瘦质量（BFLM）为协变量，比较平均 BMD 值。在调整 BFLM 后，男女之间在任何部位的 BMD 均无显著差异（p>0.05）。男女在 AP 或 LAT 脊柱、FN 或 WB 各部位在第 1 次和第 5 次就诊之间均无显著差异。男性在 2 年内超远端前臂的 BMD 显著增加（p=0.044）。然而，男性中有 56%（n=9）的超远端前臂 Z 评分<-1.0。11 名女性中有 7 人的 LAT 脊柱 Z 评分<-1.0，13 名女性中有 4 人的 AP 脊柱 Z 评分<-1.0。在 2 年的时间框架内，各部位的 BMD 均无显著变化，除了男性非优势前臂的 BMD 显著增加。在检查 Z 评分结果时，本研究中女性的脊柱似乎是一个令人关注的区域。教练和医务人员需要不断向大学生耐力运动员灌输通过大学期间获得和维持 BMD 的重要性。
