How to Track Sleep with Your Fitness Tracker

Many fitness trackers keep on tracking even after you've hit the sack, providing you with information about how long you slept, how many times you woke up and your overall sleep quality. But some trackers first need to be placed into sleep mode before they can collect this information. Here's how to track your sleep with some of the most popular fitness trackers:

Jawbone UP24

Fitbit Flex

Fitbit One

Misfit Shine

Basis B1

The Basis does not have a sleep mode. It automatically detects when you're sleeping and when you wake up.

Nike+ Fuelband SE

The original Nike+ Fuelband does not track sleep, but the newer Fuelband SE can track your sleep time. Here's how it works:

Withings Pulse O2

Follow Rachael Rettner @RachaelRettner. Follow Live Science @livescience, Facebook & Google+.