Sleep fragmentation can be caused by many factors, internal and external. What makes this mystery even harder to solve is that we often do not remember the factors that disturb sleep in the middle of the night.
Finally, fragmented sleep can be caused by an undiagnosed sleep disorder, such as restless legs syndrome, insomnia, or sleep apnea. All three of these conditions can cause multiple awakenings that may or may not be remembered, preventing the body from getting enough restorative sleep. Make an appointment with a sleep professional if you think you may be suffering from a sleep disorder.
Bonus: Modern gadgets make it easier to collect information without necessarily needing to spend a night in a sleep lab.
If you have additional symptoms such as recent memory problems, or awakenings at night from extremely loud snoring (or if your bed partner complains of loud snoring), you may want to speak to a specialist about your risk for sleep apnea. Sleep apnea awakenings can be very short, and they are not always accurately recorded by Zeo.