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.
To check if a new FW is available for your ROX 12.1 EVO, you need to connect the ROX to the Wifi. Under
the item Settings->Update Firmware the ROX searches for the latest FW. If a new FW is available, you
can download it directly and then install it. Note: Do not turn off your ROX during the download of the
update.
SIGMA PERFORMANCE INDEX (SPI)
UPDATE THE FIRMWARE ROX 12.1 EVO
TECHNICAL INFORMATION ROX 12.1 EVO
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