1, V step means that when people walk, when they cross their feet and take a step, one foot will step in front of the other and then take the next step. This gait is usually regarded as an abnormal or abnormal way of walking, which is caused by muscle or nerve problems.

2. Step A is a normal way of walking, also known as normal gait. In step A, when a person walks, each foot will take a step from one side of the center line and swing outward, so that the two feet are shaped like the letter "A". This gait is one of the most common walking styles for normal healthy people.