The X-Wrist band extracts Total Sleep Time which includes your light sleep + deep sleep data.

The dashboard will automatically sync the Total Sleep Time from the band if it records sleep activity between 21:00 and 09:00.

Total Sleep Time means the total amount of sleep you had the previous night.

The band does not record naps or sleep cycles that are not included in the specified timeframe (21:00 - 09:00).

Health experts recommend that adults get about 7 to 9 hours of sleep per night.

When you sleep, your body goes through several sleep cycles consisting of multiple sleep stages.

The first of these is light sleep. Together, these make-up roughly half of a typical night of sleep.

This is typically the beginning of the sleep cycle as we transition from full wakefulness to light sleep.

During light sleep, your heart and breathing rates are lower than they are when you are awake.

There are bursts of electrical activity in your brain, which boost your brain’s communication system and your ability to learn and remember.

You dream during light sleep, but these dreams don’t form the same coherent, story-like narrative as dreams in REM sleep do.

Because your body is still sensitive to noise, temperature, touch, and movement during this stage, it’s easier to wake up in light sleep.

Sometimes, if you’re woken up during this stage, it may feel like you weren’t even sleeping at all.

During deep sleep, your breathing, heartbeat, body temperature, and brain waves reach their lowest levels. Your muscles are extremely relaxed, and you are most difficult to rouse.

Deep sleep stage is known as the healing stage, when tissue growth and repair take place, important hormones are released , and cellular energy is restored.

How much deep sleep should you get?

In healthy adults, about 13 to 23 percent of your sleep is deep sleep. So if you sleep for 8 hours a night, that’s roughly 62 to 110 minutes.

However, as you get older you require less deep sleep.

You can track your entire sleep cycle history in "Monitor"→"Sleep"

You can also track your sleep inside the band menu by pressing the button nine times until you reach this screen.