In order to be healthy, teenagers need enough sleep.

为了健康，青少年需要足够的睡眠。

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People should not need an alarm clock to wake them if they are getting enough sleep, the Mayo Clinic says, while acknowledging that throwing away one's alarm clock may be unrealistic.

如果人们得到了足够的睡眠就不需要闹钟来叫醒。不过要让人们脱离闹钟还是不太可能的。

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Did his sleep really need to be interrupted when he wasn't getting enough anyway?

他本来就睡眠不足了，真的必要再去打扰他吗？

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"You need enough sleep to wake up and not feel tired and fatigued the next morning, " he says.

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You need to get enough sleep.

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So unless you are lucky enough to not need the sleep and feel well without it, I would try to exercise in a way that does not cut into your rest.

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