Anaerobic Threshold Calculator
AT from Max Heart Rate
Estimate anaerobic threshold heart rate from max HR
bpm
AT Pace Estimation
Estimate anaerobic threshold pace from a recent race result
Formula
AT HR = Max HR x threshold% (80-92% depending on fitness) | AT Pace ~ 10K race pace
Frequently Asked Questions
What is the anaerobic threshold?
The anaerobic threshold (AT) is the exercise intensity at which lactate begins to accumulate in the blood faster than it can be cleared. Below AT, exercise can be sustained for long periods. Above AT, fatigue sets in rapidly.
How do I find my anaerobic threshold?
Lab tests (blood lactate) are most accurate. Field estimates include: ~85% of max HR for intermediate athletes, your 10K race pace, or the pace you can sustain for about 60 minutes all-out.
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