记下你的精力充沛度、头脑清醒度以及安宁感。

Note the effects on your level of energy, mental clarity, and feeling of well-being.

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身体的清醒度与光线息息相关，当天亮了我们会醒来，反之我们就会想睡觉。

Your body is hardwired to wake up when light is bright and go to sleep when it gets dark.

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每隔一小时测量一次参与者的客观警觉性，心理动作警觉作业测试与清醒度维持测试交换进行。

Objective alertness was measured by hourly testing, alternating the PVT with the Maintenance of Wakefulness test (MWT).

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