How Does Rouvy Control Resistance And Calculate Virtual Power
Rouvy Apps simulate outdoor rides as much as possible in terms of indoor conditions. We are working with a pre-defined model, which takes into account slope, gravity, air resistance (standard cycling position, not the TT position), the weight of the bike/cyclist and many other factors. On the base of this model, we set the resistance on smart trainers and the user gains the feeling of the Outdoor ride.
Of course, everything depends on the type of trainer and possibilities to control the trainer, etc. Cheaper smart trainers have limited max slope (above that conditioned by exact minimal cadence). Some of the trainers cannot simulate descents because they have a minimal load of resistance during the zero slope by its nature. In general, direct drive trainers are the best to “Bring the Outdoors Inside.“
Rouvy divides trainers into three main categories:
"Smart" trainers, where it is possible to read the power output, moreover you can also control the resistance via Rouvy Apps. You can choose for example from:
- CycleOps Hammer, Magnus, PowerBeam
- TACX Neo
- KETTLER S
- Wahoo KICKR etc.
This category includes all the trainers and sensors, where it's JUST possible to read accurate power output, but it´s not possible to control the resistance. There are a few representatives of this category:
- PowerTap power meters combined with any trainer
- Kinetic trainers with InRide
- Elite trainers with Misuro+
An important factor is that Rouvy primarily searches for the power meter and it doesn’t care about the trainer. All of the accurate data is obtained from the power meter, and it doesn't matter how resistance is controlled.
If the user has no access to either a power meter or a smart trainer, there is still an option to use some of the supported Turbo trainers (from the list of supported trainers for sure), together with a speed sensor. When you choose the type of trainer, Rouvy Apps start to search for available speed sensors.
Once the sensor is connected and trainer was chosen, it is possible to calculate virtual power output. Rouvy Apps calculate virtual power output based on actual speed and power curves of choice of the trainer.
Note: If you're using a power meter together with any Turbo trainer (including speed/cadence sensors), we highly recommend connecting via power meter in Apps. Measured power output is more accurate, so the final simulation of the outdoor ride will be more realistic.You can find all information about compatible trainers here.
Did you know that:
Power is simply the amount of work or energy you expend in a given time frame and is measured as a watt. Normally, work or energy is represented as a joule, while time is represented in seconds. So 1 watt is equal to 1 joule of energy per second, while 100 watts is equal to 100 joules per second. As a point of reference, 1 horsepower is equal to 746 watts or 746 joules of energy per second. In contrast, a professional cyclist can hold just over 400 watts for 30 minutes.