Tempo Runs: What They Are and How to Use Them in Your Training

If you have been running consistently for a while, there is a good chance you have heard the term "tempo run" and either glossed over it or wondered if you have been doing it wrong. Most runners have.

A tempo run is one of the most effective training sessions you can add to your week. It sits between your easy runs and your all-out efforts, which is exactly what makes it useful and what makes it confusing.

Here is what a tempo run actually is, why it works, and how to build one into your training week without overthinking it.

What Is a Tempo Run?

A tempo run (also called a lactate threshold run or threshold run) is a sustained effort at a comfortably hard pace. The effort is hard enough that conversation becomes difficult, but not so hard that you are gasping. You could push out a few words, but not a sentence.

The physiological goal is to train your lactate threshold, which is the pace at which your body starts accumulating lactic acid faster than it can clear it. Running at or just below this threshold for an extended period pushes that limit higher over time. The result: you can run faster before fatigue sets in.

In practice, tempo pace sits roughly 20 to 30 seconds per kilometre slower than your current 5km race pace. For many runners, it falls somewhere between a half-marathon and 10km effort. If you have been building an aerobic base with Zone 2 training, tempo work is the next layer that helps you convert that base into race performance.

Why Runners Do Tempo Work

Easy running builds your aerobic engine. Speed work develops raw fast-twitch capacity. Tempo runs sit between the two and bridge the gap between being fit and being fast.

The benefits are practical. Your threshold rises, which means your easy pace gets faster without more effort. Your ability to hold a strong pace for 60 minutes or longer improves significantly. And there is a mental component too: holding a hard-but-manageable effort for 20 to 40 minutes builds the kind of patience and discipline that shows up in races when things get uncomfortable.

For runners training for half marathons or marathons, tempo runs are particularly valuable. Marathon pacing comes down to knowing exactly what sustainable effort feels like and holding it. Tempo runs teach that feel.

They also complement strength training, which many runners add alongside their aerobic work. Where strength builds the structural capacity to handle load, tempo runs build the engine to use it.

How to Structure a Tempo Run

There are three common formats. All of them work. Which one you use depends on where you are in your training.

Classic tempo (20 to 40 minutes continuous): Warm up for 10 to 15 minutes at an easy pace, run 20 to 40 minutes at tempo effort, then cool down for 10 minutes easy. This is the simplest version and works well when you are comfortable with sustained effort.

Cruise intervals (3 x 10 minutes with short recovery): Same warmup and cooldown, but break the tempo portion into three 10-minute blocks with 60 to 90 seconds of easy jogging between each. This is a good entry point if you are new to tempo work, or if you are coming back from a break.

Progression run: Start easy, build steadily through the run, and finish the final third at tempo effort. This format feels more natural and is less structured, but still delivers a real threshold stimulus.

How often: once a week is enough for most runners. Two tempo sessions can work during a heavy training block, but be careful with recovery. Tempo runs are harder than they look on paper, and doing too many too close together is one of the most common ways runners stall their progress.

When in the week: mid-week usually works best, typically Tuesday or Wednesday. You will have recovered from the weekend long run but not yet accumulated enough fatigue to blunt the session. Avoid stacking a tempo run the day after a long run or the day before a hard track session.

For runners working on building consistency, the key is fitting tempo work into your week without crowding out recovery. One hard session among mostly easy runs is the right ratio for most people.

Pacing: The Most Common Mistake

The most common mistake with tempo runs is going too fast in the first half. It feels manageable at the start, you push harder, and by 20 minutes you are redlining and the session falls apart.

A proper tempo run should feel like this: manageable for the first 10 minutes, noticeably hard from 15 to 20 minutes, and a genuine effort to hold form and pace in the final third. If it still feels easy at 20 minutes, you probably went too slow. If it fell apart at 15 minutes, you went too hard.

Heart rate sits around 80 to 90 percent of your maximum during good threshold work. If you use a GPS watch, pacing by heart rate or feel often beats chasing a specific number per kilometre, especially as you learn what tempo effort feels like for your own body.

Always warm up. At least 10 minutes of easy running before the tempo portion is non-negotiable. Starting cold at threshold pace increases injury risk and makes the effort feel needlessly brutal from the first minute.

Gear for Tempo Runs

Tempo sessions do not require much beyond your usual run kit, but a few things actually make a difference.

A GPS watch with heart rate monitoring is useful for keeping honest about your pacing. Most runners find they go too hard in the first half without something to anchor them. Even a basic heart rate zone display is enough to flag when you are creeping above threshold.

Lightweight running kit matters more at tempo pace than on easy days. You heat up fast at threshold effort. In Australian winter, a single thin thermal layer over shorts usually handles the cold better than stacking up. You will be warm within the first kilometre either way.

If your tempo runs fall in the morning or late afternoon, glare and UV are real factors even in June. A lightweight pair of running sunglasses with photochromic or clear lenses helps you stay comfortable and avoids the squinting that affects your form more than most runners realise. The Adaptor lens from Re. is designed for these conditions. It adjusts automatically as light changes, going near-clear in darker sections and darkening when you hit open road. The Purity lens works well for consistent morning light runs. Both are built to not bounce, which matters more on the quick tempo turnover than on an easy plod.

The Re. lens guide breaks down which lens suits which conditions and light levels if you want more detail. You can also browse the full range of Re. running sunglasses here.

A foam roller or massage gun post-run helps with recovery. Tempo efforts load the calves and quads more than easy running, and a few minutes of rolling after the session keeps things moving well into the next day.

What to Expect (and When to Expect It)

Tempo runs take time to show results. Give it six to eight weeks before you expect a measurable shift in your threshold pace. The early sessions will feel hard and a bit imprecise. That is normal. Learning what tempo effort feels like in your body is part of the process.

The feedback loop is slow, but it is real. Runners who add one consistent weekly tempo session across a training block almost always notice that their easy pace improves, their long run feels less taxing, and their ability to hold effort in a race is genuinely better.

For a practical look at how to fuel before and during harder sessions, the running nutrition guide covers the basics. Tempo runs, unlike easy running, actually benefit from being well-fuelled beforehand.

If your current training week is mostly easy runs and a weekend long run, adding a single tempo session is probably the highest-return change you can make right now. The work is uncomfortable, but it is the manageable kind of uncomfortable. The kind that actually builds something.

Ready to gear up for the next session? The Find Your Pair tool helps narrow down the right lens based on when and how you run.