Runners throw around the term “ tempo run ” like confetti. It’s confusing, even for well seasoned athletes, because it’s not a cut-and-dried definition like a lactate threshold workout.

In order to clear up a search process that can become overwhelming and confusing at times, Runner’s World developed a list of versatile threshold workouts, from short repetitions to 15-plus-mile days, ...

The higher your anaerobic threshold, the faster and longer you can run without tiring out, according to Horan. Running economy is a measure of how fast you can run using a given amount of oxygen ...