摘要
目的:通过动物实验探讨10周不同强度游泳运动对生长期大鼠骨量及骨生物力学特性的影响。方法:以4周龄雄性SD大鼠为研究对象,分为正常对照组、实验对照组、无负重组、3%负重组、6%负重组及9%负重组,游泳训练共10周,每周训练6天,每次60分钟,观察10周不同强度游泳运动对生长期大鼠骨密度(BMD)、骨矿含量(BMC)和骨的结构力学[包括弹性载荷(Fe)、最大载荷(Fmax)、断裂载荷(Fb)、弹性桡度(De)、最大桡度(Dmax)、断裂桡度(Db)和能量吸收(U)]的影响。结果:实验后大鼠股骨Fmax和U无负重组低于对照组(P<0.05,P<0.01);3%负重组Fmax,De,Dmax,Db和U高于对照组和无负重组(P<0.05,P<0.01),BMD和BMC显著高于无负重组(P<0.05);6%负重组各指标均显著高于对照组和无负重组(P<0.05,P<0.01),Fmax显著高于3%和9%负重组(P<0.05,P<0.01);9%负重组De,Dmax,Db和U显著低于对照组(P<0.01),但Fb显著低于6%负重组(P<0.05),U显著低于3%和6%负重组(P<0.05,P<0.01)。结论:适宜强度的游泳运动增加了生长发育期大鼠的骨量积累,对骨结构力学特性有良好的促进作用,游泳强度不同,作用效果也不同。
Objective： The purpose of this study was about 10 -week different swimming exercise protocols affecting the bone mass and structural mechanics in growing rats. Method： 48 Sprague- Dawley rats, 4 weeks of age, were assigned to 6 groups ： natural control group （NC） , experimental control （ EC ） , 4 groups of experimental groups （ ZS, TS, SS, NS） respectively carries load by the body weight 0% , 3%, 6%, 9% weight during swimming exercise. BMD, BMC, Fe, Fmax, Fb, De, Dmax, Db and U were measured at the end of experiment. Result： Fmax, U levels in the ZS Group were all lower than in the NC Group with significant diferenc（P 〈0. 05, P 〈0. 01 ）. Fmax, De, Dmax, Db, U in the ＂IS Group were all higher than in the NC and ZS Groups with significant diferenc（P 〈0. 05, P 〈0. 01 ）. BMD, BMC in the TS Group were all higher than in the ZS Group, with significant diferenc （ P 〈 0.05）. Each index in the SS Group was higher than in the NC and ZS Groups, with significant diferenc（P 〈0. 05, P 〈0. 01 ）. Fmax in the SS Group was higher than in the ＂IS and NS Groups, with significant diferenc （ P 〈 0. 05, P 〈 0. 01 ）. De, Dmax, Db, U in the NS Group were all lower than in the NC Grpoup, with significant diferenc（P 〈0.01 ）. Fe in the NS Group was lower than in the SS Group, with significant diferenc （P 〈 0.05 ）. U in the NS Group was lower than in the TS and SS Groups, with significant diferenc （ P 〈 0. 05, P 〈 0.01 ）. Conclusion ： Swimming exercise of suitable intensity could promote the accu- mulation of bone mass and enhanced mechanical strength of bone in growing rats. Along with swimming exercise level varied, the function effect was also different.
出处
《山东体育学院学报》
CSSCI
北大核心
2010年第6期47-50,共4页
Journal of Shandong Sport University
关键词
游泳
骨密度
结构力学
股骨
大鼠
swimming exercise
bone mineral density
structural mechanics
femur
animal experiment
