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机车司机是铁路运输生产中的一个较特殊职业，它要求注意力高度集中；机车噪音对人体也有较大影”响，夜间行车可能引起人体生理昼夜节律改变，这些可导致支配心脏自主神经系统的功能发生改变，从而导致心率变化及心律失常发生。本文通过对50名健康司机在3种不同条件下行24h动
Locomotive driver is a special occupation of railway transportation, which requires a high concentration of attention; locomotive noise also has a greater impact on the human body, night driving may cause circadian rhythms of the human body, which can lead to the control of cardiac autonomic nervous system Function changes, resulting in changes in heart rate and arrhythmia occurs.Through the 50 healthy drivers in three different conditions for 24h action