The new Stryd (with wind detection) incorporates the cost of overcoming air resistance into the total power value in real-time.
You can see the total percentage of power required to overcome air resistance (Air Power) in post-run analysis on PowerCenter and some 3rd party platforms.
Many variables go into determining how much air resistance a runner has to overcome such as the local wind conditions, the humidity of the local environment, the temperature of the local environment, the air density as determined by the altitude and local weather patterns, the air resistance you are overcoming relative to the Earth (wind speed), the air resistance you are overcoming relative to yourself (running speed), unique body morphology, and more.
Running with the new Stryd in the conditions you expect to experience during a race ensures you get the most accurate estimate of how much Air Power you need to overcome. Stryd takes all the factors mentioned above into account in determining your extra exertion.
If you would like a rough, estimate of how much Air Power you can expect, you can reference the following table from the authors of The Secret of Running. This table only includes a rudimentary estimate that only accounts for total air speed (running speed + wind speed) when running outdoors.
NOTE: You should not expect your Air Power values to exactly match the value shown in the table below due to the fact that this table is making a rudimentary estimate based on two simple inputs of wind speed and running speed. This table does not have knowledge of your body shape or the local running environment, which contribute to how much air resistance a runner needs to overcome.
|Air Speed (km/h)||Air Power (Watts)|
If you would like more details on how Stryd determines Air Power in realtime, you should reference our white paper here: Adding Air Resistance Costs to Power Estimates in Running | White Paper