[lxxpxlxxxx]

I remember when I played football (like 5 years ago) there were ads in the stores for cleats with chips in it for a lot of tracking, we didn't buy them because we didn't know how to use them so I don't know how they actually worked but the marketing was there (and I suspect the actual product too)

[HeyLaughingBoy]

I spent the last half-decade or so in the electronics & software end of the fitness industry and I think there are a lot of niches like this. On the one hand you have the massive market for wrist & chest strap Heart Rate Monitors, and the speed/power meters in stationary bikes. On the other there are many much smaller markets that need a particular type of fitness data that doesn't get a whole lot of external exposure.

Getting the data isn't the hard part; knowing how to make it useful is.