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Re: DCRainmaker preview of Stryd running power meter [motoguy128]
motoguy128 wrote:
synthetic wrote:
There are many power points needed for data collection... the shoulders and arms, quad, calf (for high kick back), top of foot. As that one mount point will report only 240watts just like a bike... but here there are more moving parts the influence power that really the person is probably at 340w


The wattage will always be an estimate because you're measuring acceleration, not force. The contribution of the arms would partially show in the acceleration, but there's probably some reasonable assumptions to be made. Those with good leg mechanics, probably tend to have equally good arm mechanics.

The point isn't that the wattage value is accurate, it's that it's repeatable and represents your output in a more precise way than GPS data and you don't need a measured route and stopwatch.


Out of interest, how accurately do running GPS devices measure speed?

Would they be accurate to 0.1 mph? The study below is a bit mixed and I'm not sure they tested the sort of device commonly available to runners.

http://www.ncbi.nlm.nih.gov/pubmed/25254901
Last edited by: Trev: Feb 8, 15 1:49

Edit Log:

  • Post edited by Trev (Dawson Saddle) on Feb 8, 15 1:49