1. What is Critical Power in Cycling?

Critical Power (CP) represents the highest power output a cyclist can maintain for a prolonged period without fatigue. It's a key metric for endurance performance and training zone determination.

2. How Does the Calculator Work?

The calculator uses the simple Critical Power formula:

Where:

• \( CP \) — Critical Power (watts)
• \( P_{avg} \) — Average power output (watts)

Explanation: This basic formula estimates critical power from your average power output during a sustained effort.

3. Importance of Critical Power Calculation

Details: Knowing your CP helps establish training zones, predict performance in time trials, and monitor fitness improvements over time.

4. Using the Calculator

Tips: Enter your average power output in watts from a sustained effort (typically 20-60 minutes). The value must be greater than 0.

5. Frequently Asked Questions (FAQ)

Q1: How is this different from FTP?
A: Critical Power and Functional Threshold Power (FTP) are similar concepts, with CP being more mathematically defined and FTP being more practically determined.

Q2: What's a good Critical Power value?
A: This varies by rider weight and fitness level. Competitive cyclists often have CP values of 3-6 watts/kg.

Q3: How long should the test effort be?
A: For best results, use power data from a 20-60 minute maximal effort time trial.

Q4: Can I use multiple efforts to calculate CP?
A: More advanced CP models use multiple efforts (3-5) of different durations for greater accuracy.

Q5: How often should I test my CP?
A: Every 4-8 weeks to track progress, or when you feel your fitness has changed significantly.