A device and a method of recording or disturbing the movement of a testee using a non-elastic cord. The device comprises a base, a transducer, an actuator, a cord and a power. The transducer and the actuator are disposed upon the base. The cord has a proximal end and a distal end. The proximal end passes through the transducer and winds round the actuator. The power is electrically connected to the transducer and the actuator. Wherein the actuator retracts or extends the cord so that the distance between the actuator and the distal end of the cord decreases or increases for a specified amount.本發明公開一種使用拉弦記錄測驗者動作或干擾測驗者動作的運動訓練器與使用該運動器的方法。運動訓練器包括一本體、一傳感器、一驅動機構、一拉弦以及一電源。所述傳感器與所述驅動機構設置於所述本體上。所述拉弦具有一遠端與一近端，所述近端經過所述傳感器並收捲連結於所述驅動機構。所述電源電性連接於所述傳感器與所述驅動機構。其中，所述驅動機構可驅動所述拉弦，使所述遠端接近或遠離所述驅動機構一指定距離。
