Key Laboratory of Exercise and Health Sciences of Ministry of Education, Shanghai University of Sports, Shanghai 200438, China.
Math Biosci Eng. 2019 Jan 30;16(2):898-908. doi: 10.3934/mbe.2019042.
This study aimed to analyze the biomechanical response of the knee cartilage and meniscus to a typical Tai Chi (TC) movement, brush-knee and twist-step (BKTS). Kinematic and kinetic data was recorded while an experienced TC practitioner performed normal walking, jogging and BKTS. The kinetic data were then imported into a validated finite element model of the knee joint to examine the biomechanical response of the articular cartilage and meniscus. Compared with walking and jogging, the BKTS movement showed a greater increase in the range of motion (ROM) of the knee. The ROM in the sagittal plane was 56° (walking), 38° (jogging) and 93° (BKTS). In coronal plane, the knee ROM was 8° (walking), 11° (jogging) and 28° (BKTS). And in horizontal plane the ROM was 17° (walking), 15° (jogging) and 29° (BKTS). The finite element simulation demonstrated that the pressure contact stress is much more concentrated during walking and jogging than BKTS, which is consistent with the lower peak contact stresses recorded on the cartilage and meniscus. In conclusion, the TC movement produced a gentler stress state on the meniscus and cartilage, while also requiring a greater knee ROM. Practicing TC may have a lower risk of knee joint injury compared to walking and jogging.
本研究旨在分析膝关节软骨和半月板对典型太极拳（TC）运动——抱膝扭步（BKTS）的生物力学反应。在一位经验丰富的 TC 练习者进行正常行走、慢跑和 BKTS 运动时，记录了运动学和动力学数据。然后，将动力学数据导入膝关节的验证有限元模型中，以检查关节软骨和半月板的生物力学反应。与行走和慢跑相比，BKTS 运动使膝关节的运动范围（ROM）增加更大。矢状面的 ROM 分别为 56°（行走）、38°（慢跑）和 93°（BKTS）。在冠状面，膝关节 ROM 分别为 8°（行走）、11°（慢跑）和 28°（BKTS）。在水平面，ROM 分别为 17°（行走）、15°（慢跑）和 29°（BKTS）。有限元模拟表明，与 BKTS 相比，行走和慢跑时压力接触应力更为集中，这与软骨和半月板上记录的较低峰值接触应力一致。总之，TC 运动对半月板和软骨产生了更温和的压力状态，同时也需要更大的膝关节 ROM。与行走和慢跑相比，练习 TC 可能对膝关节损伤的风险较低。
