Millions of wearable-device users record their heart rate (HR) and activity. We introduce a
statistical method to extract and track six key physiological parameters from these data …

Consumer-grade wearables are needed to track disease, especially in the ongoing
pandemic, as they can monitor patients in real time. We show that decomposing heart rate …

Real world passive measures of circadian timekeeping have the potential to improve the
efficacy of medical treatments and improve human performance on a broad scale. Here, we …

We extend and generalize an approach to conduct fitting models of periodically repeating
data. Our method first detrends the data from a baseline function and then fits the data to a …