Hi,
I've also found the "readiness score" to be completely irrelevant at times. The issue would seem to be that the readiness score is defined by using data from different types of measurements, and that the underlying algorithm, while generally valid for a given population, may not correspond to all the individuals who use Fitbit devices. For example, it seems that the evaluation of your sleep considers the amount of time that your heart rate is below your resting heart rate (RHR) to be more important than the number of hours slept. So you may have a good sleep score, but still feel tired. There's no way (or at least, no way that I've found), to tell my Charge 5 that I didn't exercise because I was sitting on an airplane, and that I'm suffering from jetlag, so the readiness score will simply consider how much energy I expended during the last few days, and conclude that I'm ready to go out and set new records. Other factors, such as unearned "zone minutes" that show up on my device seem to also contribute to errors in the readiness score - I've tried to counteract that issue by deleting the erroneous minutes, but I don't usually have time. Hoping for some guidance from Fitbit support to see if it's possible to modify some of the weighting factors in the algorithm to better adapt it to an individual situation. In the meantime, I try to listen to my muscles more than the readiness score 😉 !
