For a 20 minute test you should not be near your max, you’ll be right near your threshold hr. The old friel test is to take the avg hr for the last 20 minutes of a 30 minute time trial.
For a 20 minute test you should not be near your max, you’ll be right near your threshold hr. The old friel test is to take the avg hr for the last 20 minutes of a 30 minute time trial.