Exercise characteristics influence femoral cross sectional geometry: a magnetic resonance imaging study in elite female athletes
Exercise characteristics influence femoral cross sectional geometry: a magnetic resonance imaging study in elite female athletes
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运动特征影响股骨横截面几何形状：精英女运动员的磁共振成像研究
DOI：
10.1007/s00198-014-2935-7
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发表时间：
2015
影响因子：
4
通讯作者：
Umemura Y
中科院分区：
文献类型：
--
作者：
Honda A;Matumoto M;Kato T;Umemura Y
摘要在女运动员中研究了股骨中部横截面几何形状与运动特征之间的关联。低至高冲击力的负重运动对骨骼几何形状的影响大于非冲击力的负重运动，而低冲击力或高应变幅度/低应变率运动与高冲击力运动相比，对骨骼几何形状的影响较小。然而，很少有研究探讨股骨横截面几何形状与运动特征之间的关联。本研究的目的是利用股骨中轴磁共振成像 (MRI) 来研究这些关系。方法将 153 名年龄在 18-34 岁之间的女性精英运动员根据其运动项目的特点分为五组。运动被认为是无冲击（n= 27）、低或中度冲击（n= 39）、奇数冲击（n= 38）、高应变幅度/低应变率（n= 10）或高冲击（n= 39）。使用 MRI 图像确定骨几何参数，包括皮质面积、骨膜周长和惯性矩（骨强度指数）。结果高冲击力组显示出骨扩张，与非冲击力组和低冲击力组相比，股骨中部的骨膜周长、皮质面积（约 37.3%）和最小惯性矩（Imin，约 92.3%）显着更大。调整年龄、身高和体重后，低冲击组和高应变幅度/低应变率组的皮质面积和 Imin 也显着大于非冲击组。 结论 高应变率的高冲击运动刺激骨膜骨形成，改善股骨中轴的骨几何形状和强度指数。尽管我们的结果表明，负重运动即使是低冲击力也是有益的，但低冲击力或高应变幅度/低应变率运动对骨几何形状的影响不如高冲击力运动对股骨中轴的影响明显。
SummaryThe associations between mid-femoral cross-sectional geometry and exercise characteristics were investigated in female athletes. The effects on bone geometry for weight-bearing sports with low-to-high-impact were greater than those for non-impact weight-bearing sports, whereas low-impact or high-strain-magnitude/low-strain-rate sports had less of an effect on bone geometry compared with higher-impact sports.IntroductionMany previous studies have investigated tibial geometry in athletes; however, few studies have examined the associations between femoral cross-sectional geometry and exercise characteristics. The aim of this study was to investigate these relationships using magnetic resonance imaging (MRI) at the femoral mid-shaft.MethodsOne hundred and fifty-three female elite athletes, aged 18–34 years, were classified into five groups based on the characteristics of their sports. Sports were considered non-impact (n= 27), low- or moderate-impact (n= 39), odd-impact (n= 38), high-strain-magnitude/low-strain-rate (n= 10), or high-impact (n= 39). Bone geometrical parameters, including cortical area, periosteal perimeter, and moment of inertia (bone strength index), were determined using MRI images.ResultsHigher-impact groups displayed bone expansion, with significantly greater periosteal perimeters, cortical areas (~37.3 %), and minimum moments of inertia (Imin, ~92.3 %) at the mid-femur than non- and low-impact groups. After adjusting for age, height, and weight, the cortical area andIminof the low-impact and high-strain-magnitude/low-strain-rate groups were also significantly greater than those of the non-impact group.ConclusionsHigher-impact sports with high strain rates stimulated periosteal bone formation and improved bone geometry and strength indices at the femoral mid-shaft. Although our results indicate that weight-bearing sports are beneficial even if they are low impact, the effects of lower-impact or high-strain-magnitude/low-strain-rate sports on bone geometry were less pronounced than the effects of higher-impact sports at the femoral mid-shaft.