Kinematic Parameters to Predict Knee Diseases.

All the participants underwent a standard observational procedure: i) diagnosed with knee injuries/arthritis; ii) For KOA, take radiographic examination (x-ray) and take gait analysis on a treadmill in barefoot; iii) For knee injuries, take gait analysis before surgery, the disease of patients was confirmed by surgery (knee arthroscopy); iv)Normal people take an physical examination to avoid other disease;