Jawbone Support
Multi-Sensor Sleep Tracking

UP3 and UP4 use multi-sensor technology to provide advanced sleep detail giving you insight into your REM, Light and Deep sleep. Each sleep stage plays an important role, with REM and Deep providing the most restorative benefits.

What is REM sleep?

REM sleep is characterized by rapidly moving eyes, minimal body movement and dreaming. The brain is highly active and your muscles are paralyzed, enabling you to experience vivid dreams without acting them out.

During REM sleep, your brain internalizes lessons from the day, forms neural connections that strengthen memory, and replenishes mood-boosting chemicals like serotonin and dopamine.

What is Deep sleep?

Deep sleep is characterized by an increase in body temperature and a decrease in brain activity. Compared to other sleep stages, you are most disassociated from your surroundings during Deep sleep and it is hardest to be roused.

During Deep sleep, natural human growth hormone is released. The immune system is strengthened. Muscles, ligaments and wounds repair themselves. Deep sleep also aids fact memorization and learning in your brain.

How do I maximize REM and Deep sleep?

Develop healthy sleep habits to maximize both REM and Deep sleep. Consider the following habits and watch your Insights for more tips:

  • Aim for the National Institutes of Health recommendation of 7–8 hours of sleep every night.
  • Maintain a consistent bedtime and rise time, even on weekends, so the body's circadian rhythm keeps to a schedule.
  • Turn off bright lights and backlit devices like smartphones at least an hour before you plan to fall asleep.
  • Sleep in a cool, dark, quiet and comfortable bedroom from bedtime to rise time. Limit light, heat and other disruptions until you wake up.
  • Minimize liquids, especially caffeine and alcohol, close to bedtime.

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