Great analogy and very applicable to the testing I have done with Stryd to date. The power will vary depending on your form efficiency. So, on a treadmill using good form you could get X, but if you fatigue and form breaks down at the same pace, you would get Y...I have seen this quite consistently.
Ideally, yes, a power meter could detect shoe differences, which is something I have not seen with Stryd, but I have detected differences in Leg stiffness/Form power by changing shoes.
As per testing, you can't rely on a treadmill for validation using multiple runners, unless they are all at the same weight and the treadmill is calibrated after each use. The notion of a treadmill with force plates is ideal.
Having been testing it for a while, I have seen mostly positives. It may not provide an accurate measure, but it has proven to be consistent and reliable in its readings. Compare it to a power meter that is off by 50 watts. If it is off by 50 watts across the board, it doesn't really matter if the training zones are adjusted for such a value. It may not provide an accurate reading (+50) but it is still a valuable tool.
I wonder if we go back 10-15 years and search the early bike power conversations if they look eerily similar to this one?
Ideally, yes, a power meter could detect shoe differences, which is something I have not seen with Stryd, but I have detected differences in Leg stiffness/Form power by changing shoes.
As per testing, you can't rely on a treadmill for validation using multiple runners, unless they are all at the same weight and the treadmill is calibrated after each use. The notion of a treadmill with force plates is ideal.
Having been testing it for a while, I have seen mostly positives. It may not provide an accurate measure, but it has proven to be consistent and reliable in its readings. Compare it to a power meter that is off by 50 watts. If it is off by 50 watts across the board, it doesn't really matter if the training zones are adjusted for such a value. It may not provide an accurate reading (+50) but it is still a valuable tool.
I wonder if we go back 10-15 years and search the early bike power conversations if they look eerily similar to this one?