A tempo run is a sustained comfortably hard effort that teaches your body to hold faster paces longer. Run it at threshold pace for 20-40 minutes inside a longer workout to build 10K through marathon fitness.
Fast Running describes this effort as running at or just below lactate threshold in its tempo guide. That pace matches what you could race hard for about 60 minutes. It feels steady and demanding, but still controlled.
Medical information disclaimer: This article is for general educational purposes only and does not provide medical advice, diagnosis, or treatment. Always consult a physician or other qualified health professional about symptoms, medications, tests, or treatment decisions.
Table of Contents
- What pace should you aim for?
- How long is a tempo session?
- Why does it make you faster?
- Which tempo workout should you choose?
- How often should you run tempo?
What pace should you aim for?
Exercise physiologist Jack Daniels defines the classic tempo as about 20 minutes at threshold pace, detailed in Azumio's summary of Daniels' Running Formula. He often prescribes it as 25-30 seconds per mile slower than current 5K pace. The Run Experience describes practical tempo pace as slightly slower than 10K race pace but faster than half-marathon pace.
Effort feels like 6-7 out of 10, or about 85-90% of maximum heart rate. To set pace, take your current 5K pace and add 25-30 seconds per mile. On hills, wind, or tired legs, use effort and heart rate instead of the watch.
How long is a tempo session?
HowStuffWorks outlines a standard session as 20-40 minutes at tempo pace inside a longer run in its tempo-run guide. Bracket it with 10-15 minutes of easy warm-up and cool-down.
Start relaxed and finish with control. Use this simple structure: Start at 20 minutes and add a few minutes each week. Stop the tempo portion if form breaks down.
- Warm up 10-15 minutes easy with a few short strides.
- Run 20-40 minutes at tempo pace without surging.
- Cool down 10-15 minutes easy.
- New runners can split the tempo block into shorter repeats with jog recoveries.
Why does it make you faster?
Triathlon explains that tempo training improves lactate clearance and metabolic efficiency in its sweet-spot pace guide. That lets you hold faster paces longer before fatigue. The benefit matters most for 10K through marathon racers.
Ketone.com cites a 20-week threshold program that raised power at threshold by 38%-42% in young and middle-aged men. It also cites six weeks at threshold helping veteran endurance athletes run 19 minutes longer at threshold pace. More power at threshold means race pace costs less effort. Extra minutes at threshold pace mean late-race slowdown arrives later.
Which tempo workout should you choose?
The Sport-Calculator guide to Jack Daniels VDOT lists three useful formats. Pick one that matches your experience and race distance.
Continuous tempos build focus, cruise intervals add control, and long-run segments add race specificity: New runners often handle cruise intervals best because brief jogs keep form sharp. Marathon runners often use long-run tempos to practice tired-leg control.
- Continuous: 20 minutes steady at threshold pace.
- Cruise intervals: 5×1 mile or 3-4×8 minutes with 1-minute jogs.
- Long-run tempo: add a tempo segment into a longer run.
How often should you run tempo?
Women's Running UK advises no more than one tempo session per week. Tempo counts as hard training and needs recovery.
Place it between easy or rest days. New speedworkers should alternate tempo weeks with interval weeks. Keep most weekly miles easy, run the next day easy, and add time only when the current session feels controlled.