Understanding power output is crucial for effective cycling training, and Comparing Power readings from different devices is a common challenge for athletes. Many cyclists find themselves questioning the accuracy and consistency of their power data when using multiple power meters, such as pedal-based systems like Assioma Duo and smart trainers like the Wahoo Kickr. This article delves into how to effectively compare power data from these sources to ensure you’re training with the most accurate information.
When you introduce a new power meter, like the Assioma Duo pedals, alongside your existing Wahoo Kickr ’18, discrepancies in power readings are not uncommon. Initial observations, such as a 10W difference, can be perplexing. This variation often stems from several factors. Pedal-based power meters, like Assioma Duo, measure power directly at the source – your pedals – providing instantaneous data. In contrast, smart trainers such as the Wahoo Kickr measure power at the trainer’s hub, which can introduce some smoothing in the data reported in applications like Zwift. This smoothing effect in trainer data can make real-time comparisons challenging, as pedal power data might appear more volatile.
To accurately compare power from your Assioma Duo and Wahoo Kickr, you need to capture data from both simultaneously. Using a Garmin Edge 830 to record the Assioma Duo power is a good starting point. For the Kickr, you can record data through your PC-based setup, perhaps using Zwift or TrainerRoad in minimized mode. Exporting data from both platforms into a spreadsheet program like Excel allows for a detailed, side-by-side analysis. Look for metrics such as average power, normalized power, and peak power over identical time intervals within your ride. Analyzing these metrics will provide a clearer picture than simply observing live data screens.
One issue you might encounter is the phenomenon known as “sticky watts” when using Assioma Duo as the power source controlling Zwift with a Kickr. This “sticky watts” effect, where power readings remain elevated for a few seconds after you stop pedaling, is a known behavior and can indeed affect how TrainerRoad responds to power changes during workouts. It’s essential to be aware of this lag, especially during interval training, as it might slightly delay the trainer’s resistance adjustments.
Despite these nuances, integrating your Assioma Duo into your training plan is a worthwhile step towards potentially more accurate outdoor power data. Performing a ramp test using the Assioma Duo as your power source to establish a new FTP is a logical approach. This will ensure your training zones are calibrated to the power meter you intend to use most frequently, especially if you plan to use the Assioma Duo for outdoor rides and want consistent power metrics across both indoor and outdoor training.
In conclusion, comparing power meters requires careful data capture and analysis beyond just glancing at live readings. By recording data from both your Assioma Duo pedals and Wahoo Kickr, and then analyzing it in detail, you can gain valuable insights into any discrepancies and ensure you are training with the most reliable power data. Embracing the accuracy of pedal-based power for setting your training zones can ultimately lead to more effective and data-driven cycling improvements.
