How to do Threshold training with Tempo runs

Doing tempo runs is a great way to increase your endurance at higher intensity efforts.

Generally these workouts are conducted at or around (but not exceeding) anaerobic threshold pace and they are conducted in several intervals of 8 to 15 minutes with recoveries generally shorter (or equal) to working interval.

The total time at intensity across the intervals should generally exceed 20 minutes in order to have beneficial impact.