Many brands now distill your data down into a meaningful number, so you can see how your slumber stacks up. Looking at all this data can feel overwhelming – and, when you've looked at the data for a few weeks, you'd be forgiven for wondering what it all means. If you're not cycling between them – or you're missing out on some of these stages altogether – it's a smoking gun for bad sleep, and a great place to start improving. You should cycle through these sleep stages a few times per night to feel rested – and the trackers in this guide will show this in their analysis. Sleep stages are tracked by most top sleep monitors, and this means logging the amounts of light, deep, and REM sleep plus any awake time – including tossing and turning. Older fitness trackers used wrist movement to track sleep, but now this is all combined with heart rate monitoring – and companies like Fitbit and Withings are looking at your beats per minute (bpm) during sleep to make assumptions about duration and sleep stages. The tech involved here is much more advanced than the smartphone apps that use the accelerometer to track movement under your pillow – and, as a result, things are much more accurate. Best sports watch for sleep tracking - Polar Pacer Proīefore you can pick the right sleep monitor to watch over your night, you need to know exactly what you want from one.Best hybrid smartwatch for sleep tracking - Withings ScanWatch.Best Apple Watch for sleep tracking - Apple Watch Series 8. Best sleep tracker for recovery insights - Whoop Strap 4.0.
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