Glossary: Variability Index (VI)

Variability Index is a simple measure for how steady or unsteady your power output during a ride (or run) was. For almost steady activities, VI should be below 1.05. Interval workouts or similar may have a VI of 1.2 or more.

VI [-] = xPower [W] / avg. Power [W]

See also

References

  1. https://cyklopedia.cc/cycling-tips/normalized-power-and-variability-index/

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