打断这种睡眠会使他们昏昏沉沉，特别是因为他们也往往在晚上11点前入睡困难。

Interrupting that sleep can leave them groggy, especially since they also tend to have trouble falling asleep before 11 p.m.

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在经过锻炼之后，常见的症状是会保持清醒和警觉，因此如果在晚上你已经有睡眠困难，那么在晚上锻炼是不明智的。

It's common to feel too awake and alert after a good workout, so it would not be wise to workout at night if you already have trouble sleeping.

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