随着学生的演赛能力的提高，对他们在速度方面的训练要求也越来越严格。在钢琴教学中从巴拉的行板、中板或小快板突然间转换成了快板、急板等，于是许多学生感到吃力，抱怨手指“跑不动”了，失去了往日的灵活，小臂和手腕感到酸困无力。这时，许多教师的要求使是“再熟背一下 As students improve their ability to play, their training requirements on speed are becoming more stringent. In the piano teaching from Barra’s board, the board or small allegro suddenly transformed into Allegro, anxious board, so many students feel hard, complain about the fingers “run”, lost the past agility, arm And wrists feel sour and sleepy. At this time, many teachers are asked to make "double cooked back