Division of Sport Biomechanics, School of Sport Science, Beijing Sport University, Beijing, 100084, People's Republic of China.
Department of Kinesiology, Iowa State University, Ames, IA, 50010, USA.
Sci Rep. 2021 Apr 28;11(1):9183. doi: 10.1038/s41598-021-87936-y.
For older population, a better understanding of the hip joint loading environment is needed for the prevention of hip pain, and the reduction of the stress fractures and fall risks. Using the motion analysis and inverse dynamics methods, combined with musculoskeletal modelling, static optimization, and finite element (FE) femur model, the difference of femoral neck strains between stair ascent vs. descent, young vs. older populations was compared. A two-way repeated-measures MANOVA was applied to test the effect of age and stair direction on the femoral neck strains. The strains at the femoral neck cross-section were greater for stair descent than ascent for both age groups (mostly P = 0.001 to 0006) but there was no difference between age groups. In this study, femoral neck strains represented bone loading environment in more direct ways than joint reaction forces/moments or joint contact forces, the risk of hip pain, falls and stress fractures might be greater during stair descent than ascent. Possible preventative methods to reduce these risks should be developed in the future studies.
对于老年人，需要更好地了解髋关节的受力环境，以预防髋关节疼痛、减少应力性骨折和跌倒风险。本研究采用运动分析和反向动力学方法，结合肌肉骨骼建模、静态优化和有限元（FE）股骨模型，比较了上楼和下楼、年轻人和老年人的股骨颈应变差异。采用双向重复测量 MANOVA 检验年龄和楼梯方向对股骨颈应变的影响。对于两个年龄组，下楼的股骨颈横截面上的应变都大于上楼（主要是 P<0.001 到 0006），但两组之间没有差异。与关节反作用力/力矩或关节接触力相比，本研究中股骨颈应变更直接地代表了骨受力环境，下楼时髋关节疼痛、跌倒和应力性骨折的风险可能大于上楼。未来的研究应开发可能的预防方法来降低这些风险。
