Purpose of LTHR/LTP (Lactate Threshold Heart Rate/Lactate Pace) test is to determine your Lactate Threshold HR and Pace – numbers, that are very important for building your race-oriented training plan.
For this time trial test, be rested and perform it on a running track, or on any other flat, smooth course. Warm-up for 5 minutes by gradually accelerating to a tempo which you believe you can sustain for 30 continuous minutes, but not longer. Do not start too fast, stay consistent and have in mind that the test is divided into 10-minute and 20-minute parts. They are for calculation purposes only, so do not drop your pace after a 10-minute lap is complete; you have to run for continuous 30 minutes at the fastest pace you can sustain for that amount of time. After completing the test, cool down for 5 minutes.
Your average 30 min. pace will be your Lactate Threshold Pace (LTP). Your average HR for the last 20 min. of the test will be your Lactate Threshold Heart Rate (LTHR).