The height of the foot position after kicking.
The higher the value, the higher the foot position.
This value reflects the flexion of the hip and knee joints during the swing phase when the foot is moving forward. When your muscles are tense, and you deliberately try to keep your stride wide during the swing, this will result in inefficient movement. Your legs will "move like sticks" and won't rise high. It is recommended to practice smoothly without keeping muscles tense.