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INSCYD Power-Performance Decoder (PPD) Test

INSCYD PPD provides the same level of accuracy as lab testing

“We are always looking for new ways to analyse rider performance, especially during this

unique time with all of our riders at home for the last two months and counting.

Normally, we rely on holding training camps to conduct robust testing protocol but

knowing we won’t see any of our riders in person for at least the next couple of months,

the INSCYD Power-Performance Decoder allows us to continue testing our riders despite

the distance between us,” Marco Pinotti Team Bike Exchange Head of Performance 

“INSCYD testing especially helps my coaches to help create the best training

programs for us.” Primoz Roglic 2019, 2020 2021, Vuelta a España Winner

"Thanks to INSCYD, my trainer and I always know where I currently stand and where I can

improve my performance."  Wout van Aert 2022 Tour De France Points Winner

When it comes to physiological parameters, field tests with power meters have - up to now - been of very limited use only. Lab diagnostics were needed to measure aerobic and anaerobic capacities, and fat and carbohydrate combustion rate. Field testing could – at best - estimate only the athlete’s FTP values, resulting in a very insufficient way of benchmarking performance. The biggest gap with this approach – all context of understanding how complex human performance truly is. This has changed! Introducing INSCYD’s Power-Performance Decoder (PPD).


The PPD allows me to test athletes remotely: outdoor or indoor (with the option of using a specific Zwift workout). Test on their time, or as part of a regular training session, alone on the road or trainer. Once I have received the power meter files of the test session, i'll input the data in INSCYD’S scientifically validated software.


PPD is the first and only tool combining physiological lab data (lactate values or VO2 captured in the lab or field) with field-tested power meter data. Up to now, athletes went to a performance diagnostics lab for a lactate or VO2max test for physiological data. Next, a coach might have them ride a power duration test, outdoors or on a trainer. The problem? Test results stood separately, without a way to melt them together. There was no way to capture a complete performance profile. PPD changes this! By merging physiological test data and field derived power meter data, it enables coaches and athletes to see – for the first time - how the bodies energy systems work together, and how they are to be looked at as a complete unit.


Thoroughly tested by pro teams and coaches


Derived and based only on fundamental, peer reviewed basic science, INSCYD’s PPD is used by the highest ranked cyclists and triathletes around the world. Over the last few months, PPD has been beta tested by pro teams CCC Team, JUMBO-VISMA, Alpecin-Fenix, SEG Racing as well as by many World Tour coaches and coaching businesses. Testing and benchmarking has been done in direct comparison to lactate- and lab testing, ensuring top-level accuracy is guaranteed, AND validated.


PPD offers up the following data:

Maximum aerobic performance (VO2max)

Maximum glycolytic performance (VLamax)

Accumulation and recovery of lactate

Fat and Carbohydrate combustion rates

Aerobic v anaerobic energy contribution ratios

Anaerobic Threshold



This athlete profile allows coaches to measure

and quantify the respective athlete’s unique

characteristics, resulting in a laser focused

training plan to improve race performances

and help athletes reach goals.


Key facts about Power-Performance Decoder:

  • Accuracy: Standard tolerance is on par with state-of-the-art lab testing, e.g. VO2max divergence is 2.5%, threshold is 2.2% - in line with the most accurate metabolic carts (and without requiring power meter conversions from lab to training equipment).

  • Capture race decisive glycolytic power (VLamax) without the need to visit a lab. The secret weapon of professional coaches is now available to all coaches using INSCYD.

  • Reporting - Athletes get a 360-degree physiological assessment

  • Coaches can now test remotely – for the first time ever, coaches don’t have to be with their athletes for performance testing. Athletes complete a field test on their own time, alone. When done, the athlete submits the ride file for their coach to input into INSCYD.

  • Renders traditional physiological lab testing OBSOLETE – Faster, less expensive, more accurate, all without the overhead of measuring lactate and or VO2



























Founded in 2017, INSCYD is the leading scientific software, used by top cycling, triathlon, swim, speed skating, and rowing teams/federations and coaches. INSCYD has been called the 'perfect solution to understand how training affects the adoption of specific physiological systems’ by Dennis Sandig, of the German Triathlon Federation. INSCYD offers coaches and lab owners software for power testing, lactate testing and lab testing (metabolic cart).


Coach and cyclist looking at training data
Lactate threshold chart and graph
Fat and Carbohydrate combustion rates on graph
Cyclist using ZWIFT online app
CCC and INSCYD coaches at work
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