THE PLAIT GUIDE
HRV changes and illness: what Plait can tell you
Plait displays wearable readings and their recent context. It does not predict illness, calculate your chance of infection, or send illness-detection alerts. Earlier versions of this article described an illness model and accuracy figures that were not supported by a validated Plait feature; those claims have been removed.
A chart is not an illness test
WHOOP describes its recovery readings as signals of physiological stress, not a medical diagnosis. A change in HRV does not establish what caused it. Do not use a Plait chart to decide whether you are contagious or whether you need treatment.
Inspect the reading before interpreting it
In Charts, open HRV Trends and check the date, units and available observations. Plait plots actual HRV measurements in milliseconds. Missing measurements stay missing; readiness and resting heart rate are separate signals. In Today’s Focus, the latest available readings are compared with recent observations when enough exist.
What happens next in the app
Plait may suggest reviewing your routine or keeping activity manageable. It does not turn an HRV change into a supplement prescription or an automatic calorie cut. Your saved meal target remains attached to your selected nutrition goal. If you feel unwell, seek appropriate healthcare advice rather than waiting for a wearable alert.