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练习太极拳不当,很容易引发膝关节损伤,即髌骨劳损,又称髌骨软骨病、髌骨软骨软化症。生物力学证明,膝关节屈曲小于90°时,仅股四头肌的股直肌起主要伸膝作用,其肌力较弱;当膝关节伸到130°-150°时,发力点集中,力量最强。此角度不但发力大,而且灵活,有利于各种动作的完成,此时髌骨软骨面承受力量最大,关节面接触范围也最大。膝关节的稳定主要靠髌骨维持,这些解剖、生理特点都成为髌骨软骨在半蹲位受伤时的潜在因素。
Practicing tai chi inappropriate, it is easy to cause knee joint injury, patella strain, also known as patellar cartilage disease, chondromalacia patella. Biomechanical evidence, knee flexion is less than 90 °, only the quadriceps femoris muscle plays a major knee extension, its weak muscle strength; when the knee extends to 130 ° -150 °, the focus of the power point, The most powerful. This point not only hair force, but also flexible, conducive to the completion of a variety of actions, this time the patella cartilage face to withstand the greatest strength, articular surface contact range is also the largest. Mainly by the stability of the knee patella maintenance, these anatomical and physiological characteristics have become a potential factor patella cartilage injury in the squatting.