Training
What is a tempo run?
The sustained "comfortably hard" effort that raises your threshold: the benefits, how to find the pace, and example sessions.
A tempo run is a sustained stretch of "comfortably hard" running held near your lactate threshold, roughly the pace you could race for about an hour. It is firmer than an easy run but controlled, not a sprint: a steady, rhythmic effort you can hold for 20 minutes or more once you are warmed up.
The feel is the best guide. At tempo pace you are working, breathing deeply, and can only speak in short phrases, not gasping but not chatting either. It sits right on the edge between sustainable and hard.
Why tempo runs matter
Your lactate threshold is the effort at which fatigue-causing byproducts start to build up faster than your body can clear them. Run below it and you can keep going for a long time; push above it and the clock starts ticking toward exhaustion. Tempo runs train your body to clear and reuse lactate more effectively, which nudges that threshold higher, so you can hold a faster pace before fatigue takes over.
The benefits stack up. A higher threshold means a faster sustainable race pace across 5k to the marathon. Tempo runs also teach you what goal race effort feels like, and they build the mental discipline to stay comfortable while uncomfortable, a skill that pays off in every race.
How to find your tempo pace
Aim for roughly your one-hour race effort. For many runners that lands somewhere between 10k and half-marathon race pace. Estimate it from a recent race or time trial: plug the result into the training pace calculator to get your threshold pace, then cross-check the effort with the heart rate zone calculator so you can hold tempo by pace, heart rate, or feel.
Example tempo sessions
Beginner: cruise intervals
After an easy warm-up, run 3 blocks of 6 minutes at threshold effort with 90 seconds of easy jogging between them. Breaking the tempo into chunks makes the effort approachable while still hitting the pace.
Intermediate: continuous tempo
Warm up easily, then hold 20 to 25 minutes of continuous comfortably-hard running at threshold, and cool down. The unbroken effort is where the real threshold adaptation happens.
Advanced: extended tempo
Build to 35 to 40 minutes of continuous tempo, or a longer progression that finishes at threshold pace. This deepens your ability to sustain goal effort deep into a race.
Always bookend a tempo run with an easy warm-up and cool-down, and keep the effort steady. Drifting too fast turns a controlled tempo into a race and blunts the benefit.
Frequently asked
What is a tempo run in simple terms?
A tempo run is a sustained stretch of 'comfortably hard' running held near your lactate threshold, roughly the pace you could race for about an hour. It is harder than an easy run but not a sprint: controlled, rhythmic, and firm enough that talking becomes difficult but not impossible.
How fast should a tempo run be?
Tempo pace sits near your lactate threshold, which for most runners is close to the pace they could sustain in a race lasting about an hour, often somewhere around 10k to half-marathon race pace depending on fitness. It should feel 'comfortably hard': you can speak only in short phrases, not full sentences.
What are the benefits of a tempo run?
Tempo runs raise your lactate threshold, the effort at which fatigue starts to build rapidly, so you can hold a faster pace for longer before tiring. They improve your body's ability to clear and use lactate, sharpen your sense of goal race pace, and build the mental toughness to sit in discomfort. They are one of the highest-value sessions for distance runners.
How long should a tempo run be?
The sustained tempo portion is typically 20 to 40 minutes, run continuously at threshold effort, with an easy warm-up and cool-down either side. Beginners can start with 10 to 15 minutes, or break it into shorter 'cruise interval' blocks with brief recoveries, and build the continuous time as they adapt.
How do I find my tempo pace?
Estimate it from a recent race or time trial and target roughly your one-hour race effort. A training pace calculator turns a recent result into your threshold pace, and a heart rate zone calculator gives you a matching effort band so you can hold tempo by feel, pace, or heart rate.
Raise your ceiling
Tempo runs lift your threshold. A plan doses them right.
Gritup builds an adaptive running plan around your real threshold pace, scheduling tempo runs at the right effort and the right time so you get faster without burning out.