呼吸在其生理运动上一般可以分为两种形式:其一是自然呼吸,它是维持生活中自然运动所进行的自身新陈代谢所用。另外一种用于发声的非自然呼吸,它是一种非自然状态下进行的呼吸。这种有意识的呼吸一方面是维持生命的需求,另一方面是运用相关呼吸肌肉群的运动形成一种非自然的气息排泄,将多余的气息排出体外,而形成的一种呼出气流。 Breathing in its physiological movement can generally be divided into two forms: one is natural breathing, it is to maintain the natural movement in their own life by the use of their own metabolism. Another type of unnatural breathing used to sound, it is a kind of non-natural state of breathing. This conscious respiration, on the one hand, is the need to sustain life and, on the other hand, by the movement of the relevant breathing muscle group to form an unnatural excretion of air that exudes excess air and forms an exhaled air flow.