indianacyclist wrote:
In cycling, you measure an actual power output. With Stryd, they guesstimate your power based on a formula of speed/weight/running efficiency.
It is actually more the opposite. If you know an object's mass and position in 3D space, then determining power is actually very easy. So, the secret sauce of Stryd is that they have a very good 3D accelerometer and a fast processor in a small package. IMHO, it is a butt-ton more simple than measuring power on a bike, which requires detecting impedance changes in metal, and then mathematically combining that will accelerometer data to figure out a force vector, and then mathematically combing that with moment and rotational data to arrive at a power number. It is amazing that people inherently trust bike power meters but not running power meters.