Tempo Runs Explained

A tempo run is a sustained effort run at a pace that feels comfortably hard, faster than your easy pace but well short of an all-out sprint. It's meant to be held continuously for a stretch of time, usually 15 to 40 minutes depending on experience, rather than broken into repeats like interval training. The point is to train your body to sustain a hard-but-manageable effort for longer, which is exactly the skill a strong race pace depends on. It sits at roughly the pace your body can keep clearing the byproducts of hard effort about as fast as you're producing them, which is why it feels demanding but sustainable, rather than something that unravels within a couple of minutes the way an all-out effort would.

How to gauge tempo effort without a lab test

Sports labs use blood lactate testing to pinpoint threshold pace precisely, but you don't need any of that to run an effective tempo session. The talk test is the simplest gauge: at tempo effort, you should be able to speak in short phrases, not full sentences, and definitely not comfortably chat the way you would on an easy run. If you can recite a full sentence without any strain, you're not really at tempo effort yet. If you can't string more than a word or two together, you've drifted past tempo into something closer to race pace or interval effort.

On a scale of perceived effort from 1 to 10, where 10 is an all-out sprint, tempo effort generally sits around 6 to 7. It should feel controlled and sustainable for the planned duration, not like you're fighting to hold on from the first minute. A useful mental check partway through a tempo run: if you're confident you could hold the current pace for the entire remaining duration without slowing, you've pitched it about right. If you're already unsure at the halfway point, it's better to ease back slightly than to grit it out and fade badly later. For a deeper look at using effort instead of pace, see perceived effort versus pace.

When to use a tempo run

• Mid-training block, once you have a base of consistent easy running behind you, is when tempo work starts to pay off rather than simply adding fatigue on top of an undertrained base.
• When preparing for a half or full marathon, since tempo effort closely mirrors the sustained discomfort of race pace over distance, more so than short, sharp interval efforts do.
• As a lower-impact alternative to intervals on weeks when your legs need less pounding but you still want a harder session; one continuous effort tends to be gentler on the legs than repeated hard accelerations.
• Once every 7 to 10 days is typical; tempo runs are demanding enough that running them more often usually interferes with recovery and the easy running that should surround them.

A simple way to structure one

A beginner-friendly version is a warm-up of 10 to 15 minutes easy, followed by 15 to 20 minutes at tempo effort, then a cool-down of similar length to the warm-up. As fitness builds, the tempo portion can extend gradually, but the effort level should stay the same rather than pushing it toward an uncomfortable, unsustainable pace.

Progressing a tempo run over several weeks

The simplest way to progress a tempo run is to extend the sustained portion gradually while keeping the effort level fixed, rather than trying to run the same duration faster. A pattern that works for many runners:

Some runners progress by splitting the tempo portion instead, for example two 10-minute tempo efforts with a short easy jog between them, which can feel more manageable than one longer continuous block while still training the same sustained effort.

If you're new to structured training altogether, a fartlek session is a good way to get comfortable with harder, sustained effort before committing to a full tempo run. Once you have a race on the calendar, browse upcoming events and work backward to decide how tempo sessions fit your remaining weeks.

Common mistakes with tempo runs

• Starting the tempo portion too fast, which is the single most common way a tempo run falls apart in the final third.
• Treating tempo effort as a time trial and racing it, rather than a controlled, repeatable effort you could hold for the entire planned duration.
• Skipping the warm-up and starting the tempo segment cold, which makes the early minutes feel harder than the effort level actually warrants.
• Running tempo sessions too frequently, which blurs into interfering with the easy running and recovery a training week also needs.
• Chasing a specific pace number copied from a plan or a friend's training log instead of running the effort level the day actually allows.

Beginners vs. experienced runners

A beginner's first tempo run should be short: 10 to 15 minutes of sustained effort is plenty, and it's fine if the pace feels slower than expected relative to easy runs. What matters early on is learning to hold a controlled hard effort without surging or fading, not hitting any particular pace. An experienced runner can sustain a longer tempo portion, sometimes 30 to 40 minutes, and can fine-tune effort more precisely using recent race results as a reference point, but the underlying gauge, the talk test and a 6 to 7 out of 10 effort, stays exactly the same at either level.

How tempo runs fit into a wider training week

Tempo runs are typically the other hard day in a week that also includes an interval session, though most runners don't do both in the same week early in a plan, alternating between the two instead. The rest of the week should stay easy, including a recovery run the day after a tempo effort, so the hard work has room to actually produce fitness rather than just fatigue.