Cycle Ops Power Cal: Introducing Cycle Ops Power Cal, the worlds first-ever power meter calculated from heart rate. ANT+ compatible, simple to set up & easy to use. So if youre ready to take your performance to the next level, Power Cal can help get you there. Introducing Cycle Ops Power Cal, the worlds first-ever power meter calculated from heart rate. For years there has been a widely recognized correlation between power & heart rate. In a lab one can predict power output or intensity by knowing heart rate, & vice versa, but once you leave the lab & enter variables such as hills, wind & fatigue, the relationship gets a bit trickier, this is why many cyclists & triathletes use both a heart rate monitor & a power meter in training. Through the use of these tools & the analysis of tens of thousands of power files over the years, the experts at Cycle Ops & the University of Colorado Boulder have identified patterns which can correlate an athletes heart rate to power across all real world conditions. Weve utilized this knowledge to create a technology which provides power based on this correlation; in the real world & in real time. No, its not as precise as our Power Tap. Yes, its a great tool, is incredibly easy to use, & is compatible with any existing ANT+ compatible display. Simply pair it to your display, & off you go! Were all familiar with the key difference between a power meter & a HR monitor: that HR is a response to the work youre doing, whereas power is the actual work. The algorithms in Power Cal translate heart rate data into the vernacular of power-based training- watts, kilojoules, peak power, etc.