经单肩后滚翻成单膝跪撑平衡动作是体操课教学中一个技巧动作,教科书上的保护与帮助的方法一是:“保护者单腿跪于练习者左侧,右手托其左腿,左手托其肩部（以右肩滚动为便）。二是:保护帮助者单腿跪在练习者侧后方,双手提其腰侧。但在实际教学过程中这两种保护方法帮助总让人感? Rollback into a single shoulder after knees knees balance action is a trick in gymnastics teaching, textbooks on the protection and help method one: "Protector kneeling leg on the left side of the practitioner, right hand care of his left leg, The left hand care of its shoulder (to the right shoulder scrolls to). The second is: protect the helper knees on the back side of the practitioner with both hands to mention the waist side, but in actual teaching these two methods of protection to help people sense?