Lactate Threshold Calculator

Lactate Threshold (LT) is the exercise intensity at which lactate starts to accumulate in the blood faster than it can be removed. It's a critical marker for endurance performance and training zone determination. Show more Your lactate threshold typically occurs at around 85-90% of your maximum heart rate and represents the highest sustainable exercise intensity for extended periods. Understanding your LT helps optimize training intensity and race pacing strategies. This calculator uses heart rate-based estimation and power-based calculations to determine your lactate threshold.