Concept
Threshold run
Controlled work near the intensity where sustained effort begins to produce rapidly increasing fatigue.
What it develops
Threshold training helps a runner sustain a strong aerobic output while managing accumulating fatigue.
Continuous and interval forms
The work can be continuous or divided into repetitions with short recoveries that preserve control.
Why restraint matters
Running above the intended intensity changes the session and increases recovery cost without necessarily improving the target adaptation.
How to use it
Use repeatable effort, stable repetitions, and enough restraint to finish the planned volume.
Common misconception
Threshold training is not an all-out time trial and does not need to leave the runner exhausted.