My power is all over too - 55/45 at Z2 levels and gets closer to 50/50 at Z4+ levels. Left leg consistently shows higher power, but right leg (in weight room) is always stronger. Go figure. As a previous poster said - we are not symmetrical.
We can do lots of things with power data, and some things donât require much accuracy (like, training FTP) while others do (like, training sprints, or measuring CdA or Crr, or pacing on very variable terrain or in very variable wind). But in a larger sense, we pay for expensive power meters because we hope the data they provide will answer questions that we couldnât answer just with cheap speed sensors, or cheap stopwatches, or cheap HRMs. Most of the time, if all youâre doing is something like training FTP, thatâs an easy situation. But sooner or later, almost all of us come to a harder question that we canât answer without knowing that your power meter is providing accurate data (like the situations given above). Itâs when youâre trying to answer hard questions that you donât want to have to ask yet another question: is what Iâm seeing a result of something real, or is it because my power meter is off?
That said, a lot of these issues would be clearer if single-sided power meters just reported half of what they currently report instead of doubling it. Most people could still use it for training FTP.
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