Abstract: System and methods of using an Artificial Intelligence (“AI”) trained model for classifying a patient's gait include receiving a video of a patient on the gait analysis device; classifying the patient's gait using a machine learning process on the gait analysis device; wherein the machine learning process is generated from an Artificial Intelligence (“AI”) trained model comprising: a key point trained model configured to generate a set of key points on a patient's body; an Angle-Based Approach configured to use the set of key points to classify the patient's gait based on angle calculations between key points; and a Key Point Path Track-Based Approach configured to use the key points to classify the patient's gait based on a patient's stance phase and swing phase.