As I mentioned earlier, your daily strain and recovery go hand in hand with your sleep and vice versa.
The sleep pillar tells you how much rest you got, the time you spent in bed, how many disturbances you had, latency (how long it took you to fall asleep), and your sleep efficiency (the amount of sleep you got versus the amount of time you spent in bed). It also tracks how much time you spent in each sleep stage (awake, light, REM, and slow-wave sleep).
In addition to that information, the sleep performance coach tells you how many hours of sleep you need based on whether you want to get by, peak, or perform the following day. It also provides you with a suggested bedtime and wake time in order to meet your performance goals.
Why I like the sleep tool: I find the sleep tool to be extremely helpful because it helps keep me in check and realistic about what I can and cannot do physically. I often find myself in the red (poor sleep), and it's a good reminder that I need to make sure that I'm focusing on my sleep as much as I focus on training.
When I open the Whoop app, I instantly know how much sleep I got and can make changes to my workouts as needed so that I don't feel lethargic or get hurt. Another thing I find interesting about this data set is that just because I get seven hours of sleep (this is very rare) doesn't mean it was quality sleep. I also like the sleep reminders because if I don't have them, I'll be up all night.
