Table of Contents
Understanding Training Paces
Running at different paces targets different physiological systems. Easy runs build aerobic base and promote recovery. Tempo runs improve lactate threshold. Intervals boost VO2max and running economy. Long runs develop endurance and fat oxidation. Training at the right pace for each workout type maximizes improvement and minimizes injury risk.
Most elite coaches recommend that 80% of weekly mileage should be at easy pace, with only 20% at moderate-to-hard efforts. This polarized approach prevents overtraining while still providing sufficient stimulus for improvement. Using a recent race result to calculate these paces ensures they match your current fitness level.
How Paces Are Calculated
These multipliers are based on Jack Daniels' VDOT running formula principles. Interval pace is approximately 95% of race pace for a 5K, while long run pace is similar to easy pace. The calculator uses the Riegel formula to normalize race times across distances before deriving training paces.
Training Pace Zones
| Zone | % of Race Pace | Purpose | Effort |
|---|---|---|---|
| Easy | 125-135% | Aerobic base, recovery | Conversational |
| Long Run | 120-130% | Endurance, fat burning | Comfortable |
| Tempo | 107-112% | Lactate threshold | Comfortably hard |
| Interval | 93-97% | VO2max improvement | Hard |
| Repetition | 88-92% | Speed, running economy | Very hard |
Sample Training Paces
| 5K Time | Easy (mi) | Tempo (mi) | Interval (mi) |
|---|---|---|---|
| 20:00 | 8:00-8:40 | 6:55-7:10 | 6:05-6:15 |
| 25:00 | 10:00-10:50 | 8:35-8:55 | 7:35-7:45 |
| 30:00 | 12:00-13:00 | 10:20-10:45 | 9:05-9:20 |
Frequently Asked Questions
Which race distance should I use?
Use your most recent race result, ideally from the past 4-6 weeks. A 5K race provides the best data for calculating training paces because it tests both speed and endurance. If you only have a longer race result, the calculator will still provide accurate paces using the Riegel equivalence formula.
How often should I update my training paces?
Update your paces every 6-8 weeks or after a new race result. As your fitness improves, your easy pace may feel too slow and your tempo pace may need to be faster. Consistently running at outdated paces can lead to plateaus.
What if my easy runs feel too slow?
Easy pace should feel genuinely easy. You should be able to hold a full conversation. Most runners run their easy days too fast, which compromises recovery and makes hard days less effective. Trust the process and slow down on easy days to run faster on hard days.