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AI quick summary
- Zones come from an estimated threshold and carry error; cross-check them with perceived effort and heart rate.
- Long-term trends matter more than any single peak, and fatigue shifts what you can do on a given day.
- Give each ride one main goal and stop chasing data for its own sake.
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Data is a gauge, not a steering wheel
Power describes output, but it can't explain sleep, temperature, stress, or fueling on its own. Decide the purpose of the ride first, then choose which numbers to watch. On an endurance ride, holding steady for the planned time often matters more than chasing a higher average power.
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Leave room for the wobble
Threshold isn't a permanent engraving. Watch changes over four to six weeks and log how you feel. When the numbers and the sensation disagree, look for the cause first — don't assume your body is lying.
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