摘要
Background：Trampolining is a form of gymnastics that has increased in popularity over the last decade and due to its concurrence with the formative years of bone development,it may have an important impact on bone health.However,bone density,microarchitecture,and bone strength of competitive trampolinists have not been explored.Therefore,the purpose of this cross-sectional study was to investigate the relationship between trampolining participation and（1） bone density,area,and microarchitecture;and（2） estimated bone strength and the role of muscle and impact loading in young female adults.Methods：We recruited 29 female participants aged 16–29 years for this study（n=14 trampolinists;n=15 controls）.Skeletal parameters were assessed using dual X-ray absorptiometry,high-resolution peripheral quantitative computed tomography（HR-pQCT）,and finit element analysis（FEA）.Muscle strength was measured using dynamometers.Results：Trampolinists had higher bone density at the hip and spine,greater trabecular density and thicker trabeculae at the tibia,as well as larger bones at both the tibia and radius than controls（p〈0.05）.Trampolinists also had higher muscle strength than controls at the lower body with no difference between groups in the upper body.Estimates of bone strength using FEA were greater for trampolinists than controls at both the radius and tibia.Conclusion：This is the firs study to investigate bone density,area,and microarchitecture in female trampolinists using HR-p QCT.Trampolinists had greater bone density,area,microarchitecture,and estimated bone strength than controls.
目的:蹦床运动是一种体操形式,在过去10年日渐受到欢迎。由于蹦床训练/比赛与骨发育同时发生,所以可能对骨健康有重要影响。然而,关于竞技蹦床运动员的骨密度、微架结构和骨强度尚无相关研究。因此,本项横断面研究旨在探索参与蹦床运动与年轻成年女性的骨密度、面积、骨架结构,与骨强度预估值及肌肉和冲击负荷的作用之间的关系。方法:本研究招募了29位16-29岁女性参与者(14位蹦床运动员;15位对照组人员)。利用双能X线骨密度仪(DXA)、高分辨率CT测量(HR-pQCT)和有限元分析(FEA)测量骨骼参数,用测力计测量肌力。结果:相比对照组,蹦床运动员髋关节和脊柱的骨密度更高、胫骨的骨小梁密度更大且更厚,桡骨和胫骨也更大(p<0.05)。蹦床运动员下肢力量显著大于对照组,但上肢力量无显著差异。FEA测量的桡骨与胫骨骨强度预估值,蹦床运动员高于对照组。结论:本研究首次采用HR-p QCT研究女性蹦床运动员骨密度、面积及微架结构,发现蹦床运动员的骨密度、面积、微架结构和骨强度估算值均高于对照组。
