Author: Amy-Mae Turner / Source: Mashable

The iPhone’s “Bedtime” functionality within the alarm clock app is an innovative and interesting feature.
Working on the basis that being consistent with the amount of sleep you get (i.
e. going to bed and waking up at the same time every day) is better for your health, this useful tool makes it easier to achieve this goal.But how do you get the most out of the iPhone Bedtime feature? Here’s everything you need to know about the iPhone’s Bedtime mode, from getting started to analyzing your results.
So, how much sleep do you need?
If you’ve never really thought about it before, it can be hard to guesstimate exactly how much sleep your body needs.
While everyone is different, there are some general guidelines, based on age, to help you come up with a figure. The guidelines, published in Sleep Health: Journal of the National Sleep Foundation, were penned by a panel of experts that looked at 320 studies on the matter.
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Teenagers (ages 14-17): 8-10 hours
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Young adults (ages 18-25): 7-9 hours
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Adults (ages 26-64): 7-9 hours
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Older adults (ages 65-plus): 7-8 hours
It’s worth taking these guidelines seriously. Getting yourself into long-term “sleep debt” has been linked to obesity, diabetes and cardiovascular disease.
Getting started with Bedtime

The setup process the first time you use Bedtime is pretty simple. Your iPhone will guide you through as soon as you hit the “Get Started” button.
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