Just after kicking the horse to start, the archer stands up in the stirrups, spreading his knees, this is called kuramawari, in order to keep three sun spaces between his body and the saddle.
ウマを追い出すとともに鞍まわりといって、左右の膝をひらき鐙に立ち上がり、身体は鞍と3寸くらいあくようにする。