Since my last post the mobile app has advanced quite a bit. There's now the ability to use the app as a standalone head unit for the stryd - indoors or out. (Parents I'm looking at you now.) Stryd figured out how to make the device work for the treadmill. They built functionality into the app so that you can change the speed/incline as you do the treadmill. What does this mean?
I do have a few more questions though. As triathlon season fades into the winter running season, my weight goes up. When I updated the stryd to reflect increased weight, I noticed my average power go up as well. Now, I can't tell for sure if this is something that resulted from the weight increase or that I have more available force production than before. We'll have to wait and see what happens when spring comes and my weight goes back down. As far as consistency in training, I could forsee a few problems if power shifts with weight. Using watts/kg (also the standard in cycling) can help avoid issues like this.
I do want to revisit the issue of running surface force absorption. My thoughts are that this is still a valid issue - and does need revisiting. It's possible that profiling running surfaces needs to be in the hands of the individual athletes. Similar to the way heat maps are developed in strava, athletes should be familiar with the their favorite running haunts, and know which surfaces are softer (i.e. sand, grass, possibly tracks). Comparing individual runs would be more effective than indivually profiling running surfaces.
What would make the stryd pioneer perfect? An accompanying wearable that is gps capable, bluetooth enabled, and can store enough music via amazon or itunes to last an entire marathon. The device itself is pretty much already perfect.