Recovery Tracking: Sleep, HRV & Body Charge Score

Cora’s Body Charge score combines your sleep quality, HRV, and resting heart rate into one clear number. Know exactly how recovered you are every morning, and get training recommendations that match.

Body Charge is Cora’s daily recovery score. It is a single number between 0 and 100 that represents how recovered your body is and how ready you are to take on physical stress. Think of it as your body’s battery level for the day.

Most fitness apps give you raw data and leave you to figure out what it means. You see your HRV number, your sleep stages, your resting heart rate, but you have to piece together the full picture yourself. Body Charge does that synthesis for you. It weighs the inputs that matter, accounts for trends over time, and gives you one clear score that answers the question: “How hard should I train today?”

A Body Charge of 80 or above means your body is well-recovered and ready for high-intensity work. Scores in the 50 to 79 range suggest moderate training is appropriate. Below 50, Cora will recommend lighter activity or full rest to help your body catch up. These are not arbitrary thresholds. They are calibrated to your personal baseline and adapt as Cora learns your patterns.

Every morning, Cora pulls the latest data from your wearable device. It collects three primary inputs: your sleep data (duration, stages, and disturbances), your heart rate variability (HRV), and your resting heart rate. These three signals are the most reliable, research-backed indicators of physical recovery available from consumer wearables.

Cora does not just look at last night’s data in isolation. It compares your numbers against your personal rolling baseline. A resting heart rate of 55 bpm might be perfectly normal for one person but elevated for another. By tracking your individual trends over weeks and months, Cora builds a model of what “normal” looks like for you and detects meaningful deviations.

The result is a Body Charge score that reflects your actual physiological state, not a generic estimate. It accounts for training load from previous days, sleep quality trends, and autonomic nervous system balance as measured through HRV. All of this happens automatically in the background. You just wake up, check your score, and know where you stand.

One number that tells you how recovered you are. Calibrated to your personal baseline, updated every morning from your wearable data.