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Impact loading in female runners with single and multiple bone stress injuries during fresh and exerted conditions

Journal of Sport and Health Science 2023年第3期12卷 406-413页

作者： Kristin L.Popp Jereme Outerleys Sarah Gehman Margaret Garrahan Sara Rudolph elizabeth loranger Kathryn E.Ackerman Adam S.Tenforde Mary L.Bouxsein Irene S.Davis Military Performance Division United States Army Research Institute of Environmental MedicineNatickMA 01760USA Endocrine Unit Massachusetts General HospitalHarvard Medical SchoolBostonMA 02114USA Department of Physical Medicine and Rehabilitation Spaulding Rehabilitation HospitalHarvard Medical SchoolCambridgeMA 02138USA Department of Sports Medicine Boston Children's HospitalHarvard Medical SchoolBostonMA 02115USA Center for Advanced Orthopedic Studies Beth Israel Deaconess Medical CenterHarvard Medical SchoolBostonMA 02215USA

Background:Bone stress injuries(BSIs)are common in female runners,and recurrent BSI rates are *** work suggests an association between higher impact loading during running and tibial ***,it is unknown whether impact loading and fatigue-related loading changes discriminate women with a history of multiple *** study compared impact variables at the beginning of a treadmill run to exertion andthe changes in those variables with exertion among female runners with no history of BSI as well as among those with a history of single or multiple ***:We enrolled 45 female runners(aged 18-40 years)for this cross-sectional study:having no history of diagnosed lower extremity BSI(N-BSI,n=14);a history of 1 lower extremity BSI(1-BSI,n=16);and diagnosed by imaging,or a history of multiple(>3)lower extremity BSIs(M-BSI,n=15).Participants completed a 5-km race speed run on an instrumented treadmill while wearing an Inertial Measurement *** vertical average loading rate(VALR),vertical instantaneous loading rate(VILR),vertical stiffness during impact via instrumented treadmill,and tibial shock determined as the peak po sitive tibial acceleration via Inertial Measurement Unit were measured at the beginning and the end of the ***:There were no differences between groups in VALR,VILR,vertical stiffness,or tibial shock in a fresh or exerted ***,compared to N-BSI,women with M-BSI had greater increase with exertion in VALR(-1.8%vs.6.1%,p=0.01)and VILR(1.5%vs.4.8%,p=0.03).Similarly,compared to N-BSI,vertical stiffness increased more with exertion among women with M-BSI(-0.9%vs.7.3%,p=0.006)and 1-BSI(-0.9%vs.1.8%,p=0.05).Finally,compared to N-BSI,the increase in tibial shock from fresh to exerted condition was greater among women with M-BSI(0.9%vs.5.5%,p=0.03)and 1-BSI(0.9%vs.11.2%,p=0.02).Conclusion:Women with 1-BSI or M-BSIs experience greater exertion-related increases in impact loading than women with *** observations impl

关键词： Biomechanics Bone stress injuries Fatigue Runners Stress fracture

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