Key takeaways
A tempo run is a steady run of about 20 minutes at threshold pace, roughly the pace you could race for one hour
Jack Daniels sets threshold pace at about 88 to 92% of max heart rate and suggests at least 30 minutes at that pace when it is broken into cruise intervals
Tempo runs raise sustainable speed while VO2max intervals raise the ceiling, so most plans use both
The tempo run is the workhorse session of distance running: hard enough to change your fitness, controlled enough to repeat every week. Here is what it is, how fast to run it, and how it differs from cruise intervals and VO2max interval runs.
What is a tempo run?
In the system popularised by the coach and exercise physiologist Jack Daniels, a tempo run is a steady run of about 20 minutes at threshold (T) pace. Daniels describes T pace as "comfortably hard" and roughly the pace you could race for about an hour. That places it close to the lactate threshold: the highest effort at which lactate production and clearance stay roughly in balance (see lactate threshold training).
Be aware that "tempo" is used loosely. Some coaches use it for anything from marathon pace to 10 km pace. In this article tempo means Daniels' definition: threshold effort, held steadily.
Tempo run pace
There are four practical ways to set your tempo run pace:
| Method | How | Notes |
|---|---|---|
| Race result | Enter a recent 5 km or 10 km into the VO2max running calculator and read the T pace | Most practical; uses Daniels-style VDOT tables |
| One-hour race pace | The pace you could race for about 60 minutes | Between 10 km and half-marathon pace for most recreational runners |
| Heart rate | About 88 to 92% of maximum heart rate in Daniels' system | Set zones with the heart rate zone calculator; heart rate drifts upward in the heat |
| Feel | Comfortably hard; a few words at a time, not sentences | RPE about 7 out of 10 |
The most common mistake is running tempo runs too fast, turning them into a race. If the last five minutes are a struggle, you were above threshold. The session should end with the feeling you could have kept going a little longer.
Tempo run examples
| Session | Warm-up | Main set | Pace / HR / RPE | Recovery |
|---|---|---|---|---|
| Classic tempo | 15 min easy | 20 min continuous | T pace; 88 to 92% of max HR; RPE 7 | none, 10 min easy cool-down |
| Beginner split tempo | 15 min easy | 2 × 10 min | T pace or slightly slower; RPE 6 to 7 | 2 min easy jog |
| Cruise intervals | 15 min easy | 4 to 6 × 1 mile (about 1.6 km) or 5 to 8 min | T pace; RPE 7 | 1 min jog per 5 min of running |
| Long cruise intervals | 15 min easy | 3 × 2 miles (about 3.2 km) | T pace; RPE 7 | 2 min jog |
| Progressive tempo | 15 min easy | 30 min: 10 min marathon pace, 10 min half-marathon pace, 10 min T pace | Building from RPE 5 to 7 | none |
Daniels caps threshold running in a single workout at about 10% of weekly mileage, and suggests that anyone who can handle a steady 20-minute tempo should do at least 30 minutes at T pace when it is broken into cruise intervals.
Tempo run vs cruise intervals
Cruise intervals are Daniels' broken-up version of the tempo run: repeats at the same T pace with short recoveries, about a 5:1 work-to-rest ratio. The short breaks let you accumulate more time at threshold with similar fatigue and better pace control. A continuous tempo, on the other hand, trains holding focus and rhythm, which matters for racing. Both belong in a plan; cruise intervals usually make the better weekly staple.
The same logic underlies the elite Norwegian threshold model described by Casado and colleagues (2023), which uses lactate-guided threshold intervals rather than continuous runs. Amateur adaptations such as the Norwegian singles method run reps slightly below threshold for the same reason.
Tempo run vs interval run
| Tempo run | VO2max interval run | |
|---|---|---|
| Intensity | Threshold, about one-hour race pace | Around 3 to 5 km race pace |
| Daniels pace | T (88 to 92% of max HR) | I (98 to 100% of max HR) |
| Structure | Continuous 20 min, or cruise intervals | 3 to 5 min reps, recoveries of similar length |
| Main effect | Sustainable speed | Aerobic ceiling |
| Daniels' weekly cap | About 10% of weekly mileage | About 8% of weekly mileage |
| Recovery cost | Moderate | High |
The two work best together. In Helgerud and colleagues' 2007 study, a group running continuous threshold sessions did not significantly raise VO2max over eight weeks, whereas the 4 × 4 minute interval group did. That does not make tempo runs useless: they target the fraction of VO2max you can sustain, which matters more for racing than the ceiling alone. See VO2max vs lactate threshold, the Norwegian 4×4 and other VO2max workouts.
Fitting tempo runs into your week
- One threshold session a week is a good default, with a VO2max session or hill repeats as the second quality day for experienced runners.
- Keep everything else easy, as in 80/20 training.
- A fartlek with longer surges at threshold is a looser alternative when you want variety.
- Re-test every 6 to 8 weeks and update T pace from a new race result rather than forcing faster paces.
- Watch for persistent fatigue and rising resting heart rate (recovery signals).
More guides are on the running page.
Safety: if you have a heart condition, high blood pressure, or have been inactive, get medical advice before adding hard or sustained efforts.
Frequently asked questions
What is a tempo run?
A steady, continuous run at threshold pace, usually about 20 minutes after a warm-up. It feels comfortably hard. You can speak a few words but not hold a conversation, and you could keep going a little longer at the end.
What is tempo run pace?
Roughly the pace you could race for about an hour. For most recreational runners that sits between 10 km and half-marathon race pace. Jack Daniels calls it T pace, at about 88 to 92% of maximum heart rate, and a VDOT calculator gives it from a recent race.
What is the difference between a tempo run and an interval run?
A tempo run is continuous at threshold pace and trains the speed you can sustain. An interval run uses shorter, faster repeats with recoveries, usually 3 to 5 minutes near VO2max pace, to raise your aerobic ceiling. Intervals cost more recovery.
What is a good tempo run example?
A classic tempo run is 15 minutes easy, 20 minutes steady at threshold pace, then 10 minutes easy. A beginner version is 2 × 10 minutes at threshold with 2 minutes of easy jogging between.
Sources
- Daniels J. Daniels' Running Formula, 3rd edition. Human Kinetics, 2014.
- Helgerud J, et al. Aerobic high-intensity intervals improve VO2max more than moderate training. Med Sci Sports Exerc, 2007.
- Casado A, Foster C, Bakken M, Tjelta LI. Does lactate-guided threshold interval training within a high-volume low-intensity approach represent the "next step" in the evolution of distance running training? Int J Environ Res Public Health, 2023.