Is it possible that the conventional calibration process for a heart rate monitor in Zwift is actually a hindrance to accurate HR data, and that relying solely on the riders perceived exertion and a simple calibration process can be more effective in the long run? If so, what are the implications for riders who have already invested a significant amount of time in calibrating their HR monitors according to the traditional methods? Can we really trust the data from these devices if theyre not properly calibrated, or are there other factors at play that make this process less important than weve been led to believe? Does the relationship between HR and power output vary significantly enough between riders that traditional calibration methods are inherently flawed, and if so, what alternatives can be used to get a more accurate reading?