The CP analytic is a method to evaluate your cycling performances using mean maximal powers (MMPs) between 5-seconds and 60-minutes.

**Introduction**

For all animal or human work done by skeletal muscles above a certain power level there is an almost universal relation between the produced mechanical power and the duration to exhaustion. This relation is indicated as the Power-Time or P(t) relation. Since its introduction by Monod and Sherrer the Critical Power model has been applied to the analysis of cycling performances.

The Monod Sherrer model (1965) has a very simple mathematical formulation:

The CP is the maximum rate of work that can be sustained for a very long time without theoretical fatigue, and the total amount of work that can be produced until fatigue at any level above CP is indicated as W’.

**Formula**

The Monod and Sherrer equination is valid for longer sustainable times but leads to less valid data for short sustainable times t (< 5-minutes). Therefore iQO2 uses an appropriate correction function to describe the full MMP curve:

**Performance parameters**

Based on the MMP data and the fitted curve; we can obtain some relevant cycling performance parameters:

**CP**(Critical Power)

Limit effort that can be sustained for a very long time without theoretical fatigue.**Weff**

Effective work capacity that can be delivered above CP.**AWC**(Anaerobic capacity)

The maximum value of Weff.**MAP**Maximal aerobic power value for ROI-1.**Pmax**(Maximal sprinting power)

The maximal sprinting power at t=0.**Tau**

Time constant of declining sprinting power.**SCP**(Supercritical Power) - by M. Puchowicz

Highest power above CP where Weff = ANC.**Tscp**

The cut-off time that identifies the full availability of Weff.

Learn more about the different performance parameters.

**Charts:**

Learn more how to analyze the CP charts:

- How to work with the CP charts?
- Critical power: how do I analyze the P(t) relationship?
- Critical power: how do I analyze the P(1/t) relationship?
- Critical power: how do I analyze my Anaerobic work capacity (AWC)?

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