The SIGMA Performance Index, or SPI for short, offers you an objective assessment of your training performance.
The value is made up of 3 different variables:
› The meters in altitude uphill
› The total distance of the training
› The average speed

If these values ​​increase, the SPI also increases. If you look at your SPI values ​​over time, you can see a clear increase, stagnation or deterioration in performance. The SPI does not consider any individual data such as heart rate or performance. The value is given without a unit and can have values ​​between 1 and 9999, with most values ​​in the range from 1-600.

These examples will give you a feel for the SPI:

The following examples illustrate the meaning and interpretation of the SPI:
› In a cycle race, all athletes drive the same route. The one with the highest SPI wins. The altitude and distance are the same for all athletes, only the highest average speed makes the difference here.
› If you drive the same route with the same average speed but less elevation gain, the SPI will decrease because the elevation gain is taken into account in the calculation.
› If two athletes drive the same distance at the same speed, they have the same SPI value, even if heart rate and performance may be different.