Preliminary data from an ongoing study making use of the power of Fitbits and other wearable trackers to determine the long-term effects of COVID-19 suggest that individuals infected with SARS-CoV-2 can have persisting physiologic effects after recovery.

According to the authors, this is the first study to evaluate longer duration wearable sensor data. Investigators noted a prolonged physiological impact of COVID-19, persisting for about 2 to 3 months, on average, though with considerable intra-individual variability.

It was noted that people with COVID-19 took longer to return to baseline status with regard to resting heart rate (RHR), sleep, and activity, in comparison with individuals having symptoms of viral disease but who did not have COVID-19… (Medscape)