We approached to reasons of instability of knee joint on biomechanics.
从生物力学角度探讨了膝关节不稳的原因。
The right knee pain upon sudden standing up from sitting position is due to the instability of the knee joint most likely resulted from weaken muscle power around the knee.
坐下后突然站起来导致右腿膝盖痛，是因为膝盖的周围肌力变弱而引起膝关节不稳定所致的。
Deep knee bends, for example, may increase the range of motion (ROM) of the knee joint to the point where the knee becomes more susceptible to chronic or acute instability.
例如深度屈膝，会增加膝关节的活动范围，更容易导致膝盖的急性或慢性不稳定。
应用推荐