Sato H, Andrew P D
Division of Physical Therapy, Institute of Health Sciences, Faculty of Medicine, Hiroshima University.
J Jpn Phys Ther Assoc. 2000;3(1):1-5. doi: 10.1298/jjpta.3.1.
This research examines a question about which is worse to the knee joint: increasing body weight or decreasing muscle force. We simulated unilateral weight bearing and analyzed the extent to which each had a deleterious effect on the knee joint. We used a rigid body model in which body weight was increased and quadriceps muscle force decreased. Also, to account for differences between men and women, the model reflected difference in pelvic width. In this simulation, decreasing muscle strength by 30% of its initial normal value had a stronger unfavorable effect than that of increasing body weight to the same relative degree. The effect of differences in body proportion between men and women did not appreciably influence the results, as long as masses and linear dimensions were average values of the respective sexes. Our results suggest that a patient with osteoarthritis in the knee should pay particular attention to problems of muscle weakness.
体重增加还是肌肉力量减弱。我们模拟了单侧负重，并分析了二者对膝关节产生有害影响的程度。我们使用了一个刚体模型，其中体重增加而股四头肌力量减弱。此外，为了考虑男女之间的差异，该模型反映了骨盆宽度的差异。在这个模拟中，肌肉力量降低至其初始正常值的30%所产生的不利影响，比体重增加到相同相对程度所产生的不利影响更强。只要质量和线性尺寸是各性别各自的平均值，男女身体比例差异的影响对结果没有明显影响。我们的结果表明，膝骨关节炎患者应特别注意肌肉无力的问题。
