September 1, 2026
Tempo Runs Explained: Pace, Purpose, and How Long to Hold It
Tempo runs sit between easy and hard — and most runners get the pace wrong in both directions. Here's how to find the right effort and structure a session.
A tempo run is the workout most runners either sandbag or blow up. Run it too easy and it's just a moderate run that does nothing a tempo session is supposed to do. Run it too hard and you turn a controlled effort into an interval session in disguise — and you won't hold it for the duration that makes it work.
What a tempo run is actually for
A tempo run — also called a threshold run — trains your lactate threshold: the effort level where your body shifts from mostly burning fuel aerobically to accumulating lactate faster than you can clear it. Training at or near that threshold teaches your body to clear lactate more efficiently, which raises the pace you can sustain before you "blow up."
It sits in a specific gap: harder than an easy run, easier than an interval session, and controlled the entire way through. The whole point is that it feels hard but sustainable — not a fight to survive to the finish.
How to find your tempo pace
Three practical ways to dial it in:
VDOT-based (most accurate). Threshold pace is typically **25–30 seconds per kilometer
slower than your current 5K race pace**, or roughly the pace you could hold for about an hour if racing. Plug a recent race into our tempo run pace calculator or see it alongside every other zone in the VDOT pace calculator.
The talk test. You can speak in short phrases — four or five words — but not full
sentences. If you can chat comfortably, you're too slow; if you can only grunt one word, you're too fast.
Perceived effort. A 6 or 7 out of 10. "Comfortably hard" is the cliché for a reason —
it should feel like effort you choose to sustain, not one forced on you.
How to structure a tempo session
Beginners: 10–15 minutes continuous at tempo pace, bracketed by an easy warm-up and
cool-down.
Intermediate: 20–25 minutes continuous, or 2×10–12 minutes with a short 2–3 minute
easy jog between reps.
Advanced: up to 30–40 minutes continuous, or longer broken formats (e.g. 3×10 minutes).
Cap the total tempo volume at roughly 10% of your weekly mileage — more than that and you're no longer doing a controlled threshold session, you're doing a second long run at an uncomfortable pace.
Common mistakes
Starting too fast. Threshold pace should feel almost too easy in the first few minutes.
If it feels hard immediately, you're going out too quick and will fade.
Doing it too often. One tempo session a week is plenty for most runners. Threshold work
is moderately taxing — stack two or three in a week and your easy days stop being easy.
Confusing tempo with race pace. Unless you're racing a 15K–half marathon, tempo pace is
almost always slower than your goal race pace, not the same as it.
Let your plan set the pace for you
Runapt calculates your tempo pace from your VDOT and slots threshold sessions into your plan at the right frequency for your goal — then adjusts the target if your recent paces or readiness say the number needs to move.
Build your plan free and get tempo paces set from your actual fitness, not a guess.