Running Pace Training: The Correct Way to Do a Tempo Run

The Tempo Run is one of the most valuable yet most misunderstood workouts in running training. Many runners either run it too fast (turning it into an interval session) or too slow (turning it into an easy run), missing out on the unique training benefit that a true Tempo Run provides.

1. What Is a Tempo Run

The core goal of a Tempo Run is to sustain continuous running at an intensity around your Lactate Threshold (LT).

What Is the Lactate Threshold

When exercise intensity crosses a certain critical point, the body produces lactate faster than it can clear it, and blood lactate begins to accumulate sharply. This critical point is called the lactate threshold.

Below threshold: lactate accumulates slowly, and the pace can be sustained for a long time
Above threshold: lactate accumulates rapidly, and you soon reach a point where you can no longer continue

The goal of a Tempo Run is to run at an intensity that is “just at or slightly below the lactate threshold,” progressively pushing that threshold higher so you can maintain aerobic metabolism at higher speeds.

2. How to Determine the Correct Tempo Run Intensity

Method 1: Pace-Based

Tempo Pace = 10K Personal Best Pace + 20–30 seconds/km (slower)

10K Time	10K Pace	Tempo Pace Range
40 min	4:00/km	3:40–3:50/km
45 min	4:30/km	4:10–4:20/km
50 min	5:00/km	4:40–4:50/km
55 min	5:30/km	5:10–5:20/km
60 min	6:00/km	5:40–5:50/km

You can also estimate it as 15–30 seconds/km faster than your goal marathon pace

Method 2: Heart Rate-Based

Tempo Heart Rate = 80–87% of Maximum Heart Rate

Example (runner with a max heart rate of 180 bpm):

• Target heart rate: 144–157 bpm

Method 3: Talk Test

At Tempo intensity:

• You can say a few words (“I’m okay,” “fine”)
• But you cannot speak in complete sentences
• It should feel “hard but sustainable”

If you can talk easily → you’re running too slow
If you can’t talk at all → you’re running too fast

3. Three Formats of the Tempo Run

Format 1: Steady Tempo

The most traditional format — continuous running at Tempo intensity for 20–40 minutes

Level	Distance	Time
Beginner	5–7 km	20–25 min
Intermediate	8–10 km	30–35 min
Advanced	10–15 km	40–50 min

Workout structure:

1. Warm-up: 2–3 km easy running (10–15 minutes)
2. Main set: 8–10 km at Tempo pace
3. Cool-down: 2 km easy running (10 minutes)

Format 2: Cruise Intervals

Breaks the Tempo effort into segments with short recovery periods in between

Suitable for runners just starting Tempo training or returning from injury:

Sample workout:

• 3 × 2000m (Tempo intensity), with 500m easy jog recovery (1.5–2 minutes) between reps
• Or: 5 × 1000m (Tempo intensity), with 1-minute jog recovery between reps

Format 3: Progressive Tempo

Starts slightly slower than Tempo pace and gradually accelerates up to Tempo intensity

Example: A 10 km run — the first 3 km run 15 seconds/km slower than Tempo pace, the middle 4 km at Tempo pace, and the final 3 km 5–10 seconds/km faster than Tempo pace

4. Placing the Tempo Run in Your Weekly Training

Training Phase	Recommended Tempo Volume	Notes
Base Phase	1x/week, 5–7 km	Building the aerobic base
Build Phase	1–2x/week, 8–12 km	3–4 months before race day
Taper Phase (2–3 weeks)	1x/week, shorter volume	Maintain feel for pace while reducing volume
Recovery Week	None or very short	Let the body recover

5. Common Mistakes and Fixes

Mistake 1: Running the Tempo Too Fast

Problem: The Tempo turns into an interval effort, and pace collapses after 15–20 minutes

Diagnosis: The pace difference between the first and last kilometer exceeds 30 seconds

Fix: Deliberately slow down the first half; if you feel good in the second half, you can pick it up slightly

Mistake 2: Running the Tempo Too Slow

Problem: Running in the “easy and comfortable” zone, failing to stimulate any improvement in lactate threshold

Diagnosis: You can hold a full conversation throughout

Fix: Force yourself to hold the intensity at which you “just barely cannot talk comfortably”

Mistake 3: Doing Tempo Runs Too Often

Problem: Doing a Tempo effort in every run leads to accumulated fatigue and stalled progress

Fix: No more than 2 Tempo sessions per week; the rest of your running should be easy pace

Mistake 4: Insufficient Warm-up

Problem: Jumping straight into Tempo intensity carries a high risk of muscle injury

Fix: Always warm up with 2–3 km of easy running before a Tempo effort

6. Indicators That Your Tempo Run Is Improving

How do you know your lactate threshold is rising?

1. Running a faster pace at the same heart rate
2. Running the same pace at a lower heart rate
3. Faster recovery after high-intensity efforts
4. No longer feeling extremely fatigued after Tempo runs

Recommendation: retest every 4–6 weeks — recalculate your target Tempo pace based on an updated 10K result.

7. The Relationship Between Tempo Runs and Marathon Performance

The Tempo Run directly strengthens the core physiological capacity behind marathon performance:

• A 1% improvement in lactate threshold → roughly a 1–1.5% improvement in marathon pace
• One 8 km Tempo session per week × 12 weeks → a 3–5% improvement in lactate threshold
• Corresponding marathon time improvement: approximately 4–8 minutes

Conclusion

The Tempo Run is the most scientifically grounded workout type in marathon training. Master the correct intensity, do it once a week, and pair it with sufficient easy aerobic mileage — your marathon time will improve steadily. Hard but sustainable is the simplest standard for judging your Tempo intensity.

Further Reading

• Tempo Run Pace: Calculating Lactate Threshold Pace and the 30-Minute Continuous Run
• Tempo Run Pace: Precisely Executing at the Lactate Threshold
• The Science of the Tempo Run: The Key Workout for Raising Lactate Threshold
• Tempo Run: The Core 20–40 Minute Lactate Threshold Workout