How Threshold Training Helps Runners Hold a Faster Pace Longer

Why threshold work matters

Threshold training can help you hold a faster pace for longer. That makes it a useful part of a distance-running training plan, whether your goal is to run faster or run farther. The point isn’t to turn every hard run into a race. As New York City coach Kai Ng puts it, the work builds confidence by teaching you to be “comfortable with being uncomfortable.” There’s a physical payoff, too. Training near your lactate threshold can make challenging paces feel less draining and improve your efficiency. Alex Morrow, a certified coach and founder of Resolute Running in Birmingham, Alabama, explains the idea with a bucket: running produces waste, including lactate, and your body clears it as you go. At a sustainable pace, the bucket drains fast enough. Go beyond your threshold and waste builds up faster than you can clear it; eventually, you slow down. Threshold training, in Morrow’s analogy, enlarges both the bucket and its drain. That adaptation supports speed endurance: the ability to maintain your pace as an effort continues. There’s a confidence benefit alongside it. Ng says that learning to hold pace in training can reassure runners they’re prepared to pursue their goal speed on race day. The claim is persuasive, though no workout guarantees a particular race result. The case for threshold work also appears in exercise science. An article from the University of New Mexico, by Len Kravitz, PhD, CSCS, and Lance Dalleck, PhD, calls lactate threshold a major determinant of success in endurance events and says endurance programs should aim to improve it. That’s a broad claim; the article fragment doesn’t spell out how threshold training compares with other parts of a well-rounded program.

Finding a sustainable threshold pace

Lactate threshold describes the intensity at which lactate accumulates in the blood faster than the body can remove it. Lactate is produced as the body draws energy from glucose, particularly when oxygen is limited. In practical terms, threshold marks a boundary between lower and higher-intensity exercise. A lab can measure your threshold, but a field test offers a less expensive estimate. After warming up, run as hard as you can sustain for 30 minutes; your average speed during the effort helps determine your lactate threshold pace. The test’s instructions are available here. Expect the effort to feel roughly like a 7 or 8 out of 10 on the rate of perceived exertion (RPE) scale: comfortably hard, and sustainable for about an hour, but not much longer. That description is a guide, not a license to sprint. Run Tucson co-founder and coach Tia Accetta warns against chasing speed just because you feel you could push harder: “with this lactate threshold training, don’t.”

Workouts that build threshold fitness

“Tempo run” is a broad category, not a synonym for threshold pace. Ng describes threshold runs as one kind of tempo workout; others may target marathon pace or half-marathon pace. The distinction matters when choosing an effort: a workout labeled “tempo” doesn’t automatically belong at threshold intensity. The six coach-recommended sessions span short repeats through longer runs, with the aim of building speed endurance for different runners. Two interval formats offer a gradual way in.

Interval workouts

Five-minute repeats

Short recoveries give newer runners a chance to check how each repeat felt and adjust their pace. Morrow says beginners often struggle to hold threshold pace continuously for 20 to 30 minutes, so intervals can make the effort more manageable. The format can suit runners preparing for anything from a 5K to a marathon. How to do it: - Warm up with 15–20 minutes of easy running. - Run 6 × 5 minutes at threshold pace, recovering for 60–90 seconds between repeats. - Cool down with 15–20 minutes of easy running.

Eight-minute repeats

Longer intervals extend time at pace without requiring one unbroken tempo effort. Accetta recommends them as a way to practise sustained running. A 5K runner might do two repeats; a marathoner could build to four or five. How to do it: - Warm up with 15–20 minutes of easy running. - Run 2–5 × 8 minutes at threshold pace, recovering for 60–90 seconds between repeats. - Cool down with 15–20 minutes of easy running.

Steady-state workout

Once threshold pace feels familiar, a continuous effort can add time at intensity. All three coaches recommend this type of run for runners ready to move beyond intervals. Morrow calls it simple and says it teaches runners to handle the “low-grade discomfort” that comes with distance running.

Threshold training is about learning to hold the effort

A threshold session works only if the hard portions add up to roughly 20 to 30 minutes. That might mean one steady effort or several intervals. Morrow’s test of progress is simple: over time, a pace that once felt “comfortably hard” should begin to feel more manageable. Recovery between reps matters, too. Long breaks can make it tempting to start the next interval too fast, Accetta says. Keep the recovery brief enough that you’re still carrying some fatigue into the next rep. The goal is to practise holding a controlled effort, not to feel fully rested before each repeat. Expect your mind to complain before your legs give out. “Trust your legs more than your mind,” Ng advises. When you feel like stopping, try to stay with the effort for one more minute. The workout should be challenging, but it shouldn’t become a contest in ignoring what your body can safely do. Timing matters as much as pacing. Threshold work takes time to pay off, so Morrow recommends doing it once a week during the strength and endurance-building phase of a plan. In a 16-week marathon plan, that’s about two to four weeks in. Starting these sessions just two weeks before race day leaves little time to benefit. [Improving your lactate threshold takes time](https://www.runnersworld.com/training/a70423228/how-long-to-improve-lactate-threshold-pace/), so place the work where it can build.

Progressions prepare you for the hard miles

The appeal of a marathon progression is that it asks you to change gears late in a long run, when fatigue is already accumulating. Accetta says that shifting pace can help runners maintain their target pace in the later stages of a marathon. The long version requires at least about 15 miles, so build toward it; it’s best suited to experienced marathoners. Morrow calls it tough but effective.

• Run 3–4 miles easy (3–4 RPE).
• Run 3–4 miles at goal marathon pace (4–5 RPE).
• Run 20 minutes at lactate threshold pace (7–8 RPE).
• Run 3–4 miles at goal marathon pace (4–5 RPE).
• Finish with 3–4 miles easy (3–4 RPE).

A shorter option still rehearses the feeling of tired legs while building toward and easing away from threshold effort. Accetta says runners often finish it with a welcome confidence boost.

• 1 mile easy (3–4 RPE).
• 1 mile at marathon pace (4–5 RPE).
• 1 mile at half marathon pace (5–6 RPE).
• 3 miles at lactate threshold pace (7–8 RPE).
• 1 mile at half marathon pace (5–6 RPE).
• 1 mile at marathon pace (4–5 RPE).
• 1 mile easy (3–4 RPE).

Use hills to train effort, not pace

Hill repeats offer a threshold workout for runners who want less steady mileage or aren’t ready for a continuous tempo effort. The climb builds leg and core strength while giving you an endurance stimulus. Since uphill running slows you down, judge the work by effort: aim for the same threshold feeling you’d target on flat ground. Count only the uphill running toward the 20 minutes of threshold work; the downhill jog is recovery.

• Warm up with 15–20 minutes of easy running.
• Run 10 × 2 minutes uphill at 7–8 RPE, jogging lightly back down after each repeat.
• Cool down with 15–20 minutes of easy running.

The common thread across these workouts is restraint. Keep the effort steady, make recovery short enough to preserve some fatigue, and schedule threshold sessions early enough in your plan to adapt. That’s what turns a demanding workout into practice for the miles when a race gets hard.