As far as exercise physiology is concerned, the movement of the human body is composed of bones as levers, joints as hinges and muscle contractions as driving forces. Any simple action is the result of joint contractions in various ways. Muscle relaxation and contraction (that is, tension alternately and coordinated with each other are the physiological characteristics and movement laws of all human body continuous movements. Dulcimer performance is one of the continuous movements of the human body.

Therefore, in the performance of dulcimer, whether the muscles of each part are relaxed and sensitive is the key to the quality of the whole arm movement. Their relative natural relaxation and reasonable momentary tension are not only the basic requirements for string strikes, but also the physiological basis for all performance activities. If the performance force is compared to a stream, when it passes through the channel formed by the relevant parts, it should flow smoothly. Any obstacle or blockage will hinder the flow of this "stream", resulting in unnecessary consumption of performance. And the secret to successful playing lies precisely in how to transmit the force of the strike to the keys.

Therefore, partial or whole-term continuous tension in the arm muscles will inevitably cause the wrist and fingers to be tight or stiff, hindering the fierce movement, resulting in mechanical or stagnant playing movements, causing physiological dysfunction or disappearance, and ultimately causing a waste of playing power. Or dry up, leading to partial or complete failure of the performance. If you play in this state of continuous tightness of the muscles, due to its metabolic disorder and insufficient energy supply, it will cause tendon fatigue and muscle tissue damage. Over time, occupational diseases such as tenosynovitis will occur, resulting in a decline in the player's working ability and performance level, and even forced to withdraw from the stage.