What is the VO2max calculation method using lactate and power?

The VO2max calculation method using lactate threshold and power is a highly accurate way to determine aerobic capacity for cyclists and triathletes, using data from a power meter and lactate test. The method determines power at the anaerobic threshold level (typically 4 mmol/L lactate) and converts it to maximum oxygen consumption. This is the gold standard for field testing in cycling.

How to use the VO2max calculator with lactate and power?

Perform a graded test on a bike with a power meter: start at low power (e.g., 100 W) and increase by 20-30 W every 3-5 minutes. At each stage, measure blood lactate concentration. Record power at different lactate levels. Enter the data into the calculator - it will determine FTP (Functional Threshold Power), anaerobic threshold, and calculate VO2max based on established physiological relationships.

Benefits of the lactate + power method

• Maximum accuracy for cyclists (±3-5%) thanks to direct measurement of mechanical work
• Precise determination of FTP and power training zones based on physiological data
• Validation of power meter data and detection of discrepancies in readings
• Building an individual lactate curve to optimize race strategy

Frequently asked questions about the lactate + power method

How is this method better than a simple FTP test?

A standard FTP test (20-minute maximum) determines functional threshold power empirically, without considering physiology. A lactate test shows the real anaerobic threshold based on biochemical markers, which is 5-10% more accurate. Additionally, you get a complete lactate curve that helps understand metabolic profile and optimize intensity for different types of training.

Is this method suitable for triathlon?

Yes, this method is ideal for triathletes. It's important to conduct the test in a triathlon-specific position (aerobars), as biomechanics and load distribution differ from road position. FTP and VO2max in triathlon position are typically 5-15% lower than in road position. For Ironman, it's recommended to conduct a separate test for the cycling stage.

Which power meter is best to use?

For lactate testing, any power meter with ±2% accuracy will work: pedals (Favero Assioma, Garmin Vector), cranks (Stages, 4iiii), spider (Quarq, Power2Max), or hub (PowerTap). Consistency of readings is important, not absolute accuracy. The key is to always use the same power meter for comparability of test results.