Could you sleep without an alarm? A new trend called "free sleeping is going viral" for its benefits. 

A woman named Lisa has claimed to have trained her brain to wake up naturally in the morning when she needs to. No buzzing, no beeping, no alarm at all!

She says the duration of sleep we need is different for everyone and is genetically predetermined. When she got rid of her alarm, she felt her best after sleeping for about nine hours.

So, what does she do if she needs to be up earlier? Listen back here. Could you do it?

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