1. What is Anaerobic Threshold?

The anaerobic threshold (AT) is the exercise intensity at which lactate begins to accumulate in the blood, indicating the transition between aerobic and anaerobic metabolism. It's a key measure for endurance athletes.

2. How to Measure AT

AT can be measured through:

Methods:

• Lactate Turnpoint: The point where blood lactate concentration begins to increase exponentially during graded exercise
• Heart Rate Deflection: The point where heart rate begins to deviate from linearity during graded exercise

3. Importance of AT Calculation

Details: Knowing your AT helps in designing training zones, monitoring fitness progress, and optimizing race pacing strategies.

4. Using the Calculator

Tips: Select your measurement method and enter the measured value. For lactate turnpoint, enter in mmol/L. For HR deflection, enter in bpm.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between AT and VO2 max?
A: VO2 max measures maximum oxygen uptake, while AT measures the intensity where anaerobic metabolism becomes significant.

Q2: How often should I test my AT?
A: Every 4-6 weeks during training cycles to monitor progress and adjust training zones.

Q3: Can I estimate AT without lab testing?
A: Field tests using heart rate or perceived exertion can provide estimates but are less accurate than lab measurements.

Q4: How does AT relate to race performance?
A: Higher AT allows athletes to sustain faster paces before fatigue sets in, crucial for endurance events.

Q5: Can AT improve with training?
A: Yes, specific training (especially tempo workouts) can significantly increase AT over time.