Sorry if this is answered in others posts but I didn’t find them.
In Intensity Guidelines for 80/20 Running document, it is stated:
Alternatively, you can perform a 20-minute time trial (covering as much distance as possible in 20 minutes) to determine your Threshold Pace (TP) and enter this number into the appropriate field of the 80/20 Zone Calculator. Begin with a warm-up that consists of 15 minutes of easy jogging that ends with a few 15-second surges at the pace you intend to run for the time trial. Next, run as far as you can in 20 minutes, being careful to avoid starting at a pace that’s too fast to sustain and thus slowing down involuntarily near the end.
Now, I’m a little bit confused about the terminology used – threshold and 20-minute time trial and don’t know what “appropriate field of the 80/20 Zone Calculator” to choose.
At the Run Pace calculator there are 2 options on the field “Method” that seems to correspond with the terminology: “Threshold Pace” and “20-minute Test”.
My guest is to choose “20-minute test” but I want to be sure because the two options give different results/zones.