no powermeter, no riding


(Jesus Arroyo) #1

I have a powertap, but sometimes I don’t use it. When I try zwift, I don’t have it, but I have speed, cadence and heartrate… I try ride without PT, but it’s impossible


(Jon Mayfield) #2

Zwift uses watts to propel the rider. You’re exactly right, no power, no ride.


(Allan Watkins) #3

I think if you have a trainer you can get a virtual power curve if they support it. I don’t know what all works in that method yet though.


(Jesus Arroyo) #4

i think with the heartrate and weight It can simulate the power of a rider


(Allan Watkins) #5

Heart rate is too variable and can not simulate the power of a rider. I can push 200+ watts at an average of 150bpm, and friends of mine can push 250+ watts at the same because they are cat 1/2 and 250 watts is easy for them.


(Greg Gibson-Haymarket) #6

Heart rate and power are not interchangeable but as someone already said, there should be a virtual power curve for your trainer.


(Steve Paltzer) #7

PowerTap (Saris/CycleOps) has some great info on heart rate and power for their PowerCal HR strap. The PowerCal uses algorithms to predict power based on heart rate.
http://www.powertap.com/pages/powercal-faq

In-Depth review from DC RAINMAKER:
http://www.dcrainmaker.com/2012/11/cycleops-powercal-in-depth-review.html

Similarly, TrainerRoad does “VirtualPower” by calculating power based on the “resistance curve” for your trainer model, and your speed.
http://www.trainerroad.com/virtual-power

Maybe this thread could be filed under feature request for “VirtualPower”.


(Jon Mayfield) #8

We’re riding virtual power in the office at Zwift currently. Once we like how it works we’ll release it for a few initial trainers sometime in December.

Our virtual power is very different from everybody elses, so we’re going to roll it out to select non-smart trainer owners and see how it goes.