This way, you will tire yourself out as little as possible. Remember there's no need to hit the keys with a lot of force for extra volume like on the piano. The previous text is in English. Here is a translation to Chinese (Traditional):
如此您就可以盡可能地降低疲勞。請記住，不需要像彈鋼琴一樣用力敲擊琴鍵來增加音量。