Effectiveness of Sleep Trackers and Limitations

Sleep trackers, such as wearable devices, can estimate total sleep duration and sleep fragmentation by detecting movement and using signals like heart rate. However, they have difficulty accurately estimating sleep architecture, including deep sleep and REM sleep. Relying too much on sleep tracker data can lead to anxiety and insomnia, known as orthosomnia. While sleep trackers can provide insights into how daily activities like alcohol consumption impact sleep, they are not the ultimate solution for sleep management.