Limiar Lático
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
FCmax × 85-90%
About this calculator
The Lactate Threshold is a critical physiological parameter for athletes and sports practitioners. It marks the intensity level beyond which the body starts accumulating lactic acid in muscles, leading to fatigue. The Lactate Threshold calculator estimates this value based on an individual's maximum heart rate (max HR), using a range of 85 to 90% of max HR.
The formula used is straightforward: LT HR = max HR × 0.85 to 0.90. For instance, if a person's max HR is 200 beats per minute (bpm), their Lactate Threshold would be between 170 and 180 bpm. This parameter is vital for training planning and setting fitness goals.
When should you perform a Lactate Threshold test? It's particularly recommended for athletes aiming to enhance their performance in long-distance events, such as runners, cyclists, and triathletes. It's also useful for those starting an intense training program and looking to monitor their progress.
Care must be taken when undertaking maximum efforts to determine max HR and, consequently, the Lactate Threshold. Safety and professional supervision are essential to avoid health risks.
Frequently asked questions
What is the Lactate Threshold?
It's the intensity level beyond which the body accumulates lactic acid in muscles, leading to fatigue.
How do I calculate the Lactate Threshold?
By multiplying the maximum heart rate (max HR) by 0.85 to 0.90.
Who should perform a Lactate Threshold test?
Primarily athletes in long-distance sports, such as runners, cyclists, and triathletes.
What precautions should I take during the test?
Perform the test with professional supervision and attention to safety to avoid health risks.
Can I use this calculator for any type of sport?
Yes, as long as the sport requires cardiovascular effort, such as many long-distance sports.