Optimizing Sleep with Wearable Data.

Wearable gadgets can help track sleep patterns, but not all the data they provide is equally helpful. While they can estimate sleep stages and breathing rates, they can't precisely measure what our brains are doing. However, tracking total time asleep and heart rate variability can be useful in understanding the quality of sleep. Wearables like Apple Watch, Oura Ring, and WHOOP 4.0 can help track sleep patterns, but users should pay attention to the right kinds of data.