1. What is Threshold Zone in Cycling?

The Threshold Zone represents the power output range between 95% and 105% of your Functional Threshold Power (FTP). This is the intensity where you're riding at or near your maximum sustainable power for approximately one hour.

2. How Does the Calculator Work?

The calculator uses the Threshold Zone formula:

Where:

• \( FTP \) — Functional Threshold Power in watts
• \( 0.95 \) — Lower bound multiplier
• \( 1.05 \) — Upper bound multiplier

Explanation: The formula calculates the power range that corresponds to your threshold training zone based on your FTP.

3. Importance of Threshold Zone

Details: Training in this zone improves your lactate threshold, allowing you to sustain higher power outputs for longer periods. It's crucial for time trialists and endurance cyclists.

4. Using the Calculator

Tips: Enter your current FTP in watts. The value must be greater than 0. The calculator will display your threshold training zone.

5. Frequently Asked Questions (FAQ)

Q1: How often should I test my FTP?
A: Typically every 4-8 weeks, depending on your training phase and goals.

Q2: What's the best way to determine my FTP?
A: The most common method is a 20-minute all-out test, then taking 95% of that average power.

Q3: How long can I sustain efforts in this zone?
A: Typically 30-60 minutes for well-trained athletes, though this varies by individual.

Q4: Should all my training be in this zone?
A: No, threshold workouts should be limited to 1-2 sessions per week with adequate recovery.

Q5: Does this zone apply to all cyclists?
A: While the concept applies broadly, individual physiology may cause slight variations in optimal training zones.